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Cookware and bakeware is food preparation equipment, such as cooking pots, pans, baking sheets etc. used in
kitchen A kitchen is a room (architecture), room or part of a room used for cooking and food preparation in a dwelling or in a commercial establishment. A modern middle-class residential kitchen is typically equipped with a Kitchen stove, stove, a sink ...
s. Cookware is used on a
stove A stove or range is a device that generates heat inside or on top of the device, for - local heating or cooking. Stoves can be powered with many fuels, such as natural gas, electricity, gasoline, wood, and coal. Due to concerns about air pollu ...
or range
cooktop A cooktop (American English), stovetop (Canadian and American English) or hob (British English), is a device commonly used for cooking that is commonly found in kitchens and used to apply heat to the base of cookware, pans or pots. Cooktops are o ...
, while bakeware is used in an
oven upA double oven A ceramic oven An oven is a tool that is used to expose materials to a hot environment. Ovens contain a hollow chamber and provide a means of heating the chamber in a controlled way. In use since antiquity, they have been use ...
. Some utensils are considered both cookware and bakeware. There is a great variety of cookware and bakeware in shape, material, and inside surface. Some materials conduct heat well; some retain heat well. Some surfaces are
non-stick A non-stick surface is engineered to reduce the ability of other materials to stick to it. Non-sticking cookware is a common application, where the non-stick coating allows food to brown without sticking to the pan. Non-stick is often used to ref ...
; some require
seasoning Seasoning is the process of supplementing food via herbs, spices, and/or salts, intended to enhance a particular flavour. General meaning Seasonings include herbs and spices, which are themselves frequently referred to as "seasonings". Salt may ...
. Some pots and their lids have handles or knobs made of low thermal conductance materials such as
bakelite Bakelite ( ), formally , is a thermosetting polymer, thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde. The first plastic made from synthetic components, it was developed by Belgian chemist ...
,
plastic Plastics are a wide range of synthetic polymers, synthetic or Semisynthesis, semisynthetic materials composed primarily of Polymer, polymers. Their defining characteristic, Plasticity (physics), plasticity, allows them to be Injection moulding ...
or
wood Wood is a structural tissue/material found as xylem in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulosic fibers that are strong in tension and embedded in a matrix of lignin t ...
, which make them easy to pick up without oven gloves. A good cooking pot design has an "overcook edge" which is what the lid lies on. The lid has a dripping edge that prevents
condensation Condensation is the change of the state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers to the water cycle. It can also be defined as the change in the state of water vapor ...
fluid from dripping off when handling the lid (taking it off and holding it 45°) or putting it down.


History

The history of cooking vessels before the development of pottery is minimal due to the limited archaeological evidence. The earliest
pottery Pottery is the process and the products of forming vessels and other objects with clay and other raw materials, which are fired at high temperatures to give them a hard and durable form. The place where such wares are made by a ''potter'' is al ...
vessels, dating from , were discovered in Xianrendong Cave,
Jiangxi ; Gan: ) , translit_lang1_type2 = , translit_lang1_info2 = , translit_lang1_type3 = , translit_lang1_info3 = , image_map = Jiangxi in China (+all claims hatched).svg , mapsize = 275px , map_caption = Location ...
, China. The pottery may have been used as cookware, manufactured by
hunter-gatherer A hunter-gatherer or forager is a human living in a community, or according to an ancestrally derived Lifestyle, lifestyle, in which most or all food is obtained by foraging, that is, by gathering food from local naturally occurring sources, esp ...
s. It is also possible to extrapolate likely developments based on methods used by latter peoples. Among the first of the techniques believed to be used by
Stone Age The Stone Age was a broad prehistory, prehistoric period during which Rock (geology), stone was widely used to make stone tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years and ended b ...
civilizations were improvements to basic
roasting Roasting is a cooking method that uses dry heat where hot air covers the food, cooking it evenly on all sides with temperatures of at least from an open flame, oven, or other heat source. Roasting can enhance the flavor through caramelizat ...
. In addition to exposing food to direct heat from either an open fire or hot embers, it is possible to cover the food with clay or large leaves before roasting to preserve moisture in the cooked result. Examples of similar techniques are still in use in many modern cuisines. Of greater difficulty was finding a method to boil water. For people without access to natural heated water sources, such as hot springs, heated stones ("
pot boiler In archaeology or anthropology, a pot boiler or cooking stone is a heated stone used to heat water - typically by people who did not have access to pottery or metal vessels. In Archaeology The term refers to a stone used to move heat from a ...
s") could be placed in a water-filled vessel to raise its temperature (for example, a leaf-lined pit or the
stomach The stomach is a muscular, hollow organ in the upper gastrointestinal tract of Human, humans and many other animals, including several invertebrates. The Ancient Greek name for the stomach is ''gaster'' which is used as ''gastric'' in medical t ...
from animals killed by hunters). In many locations the shells of
turtle Turtles are reptiles of the order (biology), order Testudines, characterized by a special turtle shell, shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Crypt ...
s or large
mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000  extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...
s provided a source for waterproof cooking vessels.
Bamboo Bamboos are a diverse group of mostly evergreen perennial plant, perennial flowering plants making up the subfamily (biology), subfamily Bambusoideae of the grass family Poaceae. Giant bamboos are the largest members of the grass family, in th ...
tubes sealed at the end with clay provided a usable container in Asia, while the inhabitants of the Tehuacan Valley began carving large stone bowls that were permanently set into a hearth as early as 7,000 BC. According to Frank Hamilton Cushing, Native American cooking
basket A basket is a container that is traditionally constructed from stiff Fiber, fibers, and can be made from a range of materials, including wood splints, Stolon, runners, and cane. While most baskets are made from plant materials, other materials ...
s used by the Zuni (Zuñi) developed from mesh casings woven to stabilize gourd water vessels. He reported witnessing cooking basket use by Havasupai in 1881. Roasting baskets covered with clay would be filled with wood coals and the product to be roasted. When the thus-fired clay separated from the basket, it would become a usable clay roasting pan in itself. This indicates a steady progression from use of woven gourd casings to waterproof cooking baskets to pottery. Other than in many other cultures, Native Americans used and still use the heat source inside the cookware. Cooking baskets are filled with hot stones and roasting pans with wood coals. Native Americans would form a basket from large leaves to boil water, according to historical novelist
Louis L'Amour Louis Dearborn L'Amour (; né LaMoore; March 22, 1908 – June 10, 1988) was an American novelist and short story writer. His books consisted primarily of Western novels, though he called his work "frontier stories". His most widely known West ...
. As long as the flames did not reach above the level of water in the basket, the leaves would not burn through. The development of pottery allowed for the creation of fireproof cooking vessels in a variety of shapes and sizes. Coating the earthenware with some type of plant gum, and later glazes, converted the porous container into a waterproof vessel. The earthenware cookware could then be suspended over a fire through use of a tripod or other apparatus, or even be placed directly into a low fire or coal bed as in the case of the pipkin. Ceramics conduct heat poorly, however, so ceramic pots must cook over relatively low heats and over long periods of time. However, most ceramic pots will crack if used on the stovetop, and are only intended for the oven. The development of
bronze Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals (such as phosphorus) or metalloid ...
and
iron Iron is a chemical element; it has symbol Fe () and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's o ...
metalworking skills allowed for cookware made from metal to be manufactured, although adoption of the new cookware was slow due to the much higher cost. After the development of metal cookware there was little new development in cookware, with the standard
Medieval In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of World history (field), global history. It began with the fall of the West ...
kitchen utilizing a cauldron and a shallow earthenware pan for most cooking tasks, with a spit employed for roasting. By the 17th century, it was common for a Western kitchen to contain a number of skillets, baking pans, a kettle and several pots, along with a variety of pot hooks and trivets. Brass or copper vessels were common in Asia and Europe, whilst iron pots were common in the American colonies. Improvements in metallurgy during the 19th and 20th centuries allowed for pots and pans from metals such as steel, stainless steel and aluminium to be economically produced.


Cookware materials


Metal

Metal pots are made from a narrow range of metals because pots and pans need to conduct heat well, but also need to be chemically unreactive so that they do not alter the flavor of the food. Most materials that are conductive enough to heat evenly are too reactive to use in food preparation. In some cases (copper pots, for example), a pot may be made out of a more reactive metal, and then tinned or clad with another. While metal pots take heat very well, they usually react poorly to rapid cooling, such as being plunged into water while hot, this will usually warp the piece over time.


Aluminium

Aluminium is a lightweight metal with very good thermal conductivity. It is resistant to many forms of corrosion. Aluminium is commonly available in sheet, cast, or anodized forms, and may be physically combined with other metals (see below). Sheet aluminium is spun or stamped into form. Due to the softness of the metal, it may be alloyed with magnesium, copper, or bronze to increase its strength. Sheet aluminium is commonly used for baking sheets, pie plates, and cake or muffin pans. Deep or shallow pots may be formed from sheet aluminium. Cast aluminium can produce a thicker product than sheet aluminium, and is appropriate for irregular shapes and thicknesses. Due to the microscopic pores caused by the casting process, cast aluminium has a lower thermal conductivity than sheet aluminium. It is also more expensive. Accordingly, cast aluminium cookware has become less common. It is used, for example, to make
Dutch oven A Dutch oven, Dutch pot (US English), or casserole dish (international) is a thick-walled cooking pot with a tight-fitting lid. Dutch ovens are usually made of seasoned cast iron; however, some Dutch ovens are instead made of cast aluminium, or ...
s lightweight and bundt pans heavy duty, and used in ladles and handles and woks to keep the sides at a lower temperature than the center. Anodized aluminium has had the naturally occurring layer of
aluminium oxide Aluminium oxide (or aluminium(III) oxide) is a chemical compound of aluminium and oxygen with the chemical formula . It is the most commonly occurring of several Aluminium oxide (compounds), aluminium oxides, and specifically identified as alum ...
thickened by an electrolytic process to create a surface that is hard and non-reactive. It is used for sauté pans, stockpots, roasters, and Dutch ovens. Uncoated and un-anodized aluminium can react with acidic foods to change the taste of the food. Sauces containing egg yolks, or vegetables such as asparagus or artichokes may cause oxidation of non-anodized aluminium. Aluminium exposure has been suggested as a risk factor for
Alzheimer's disease Alzheimer's disease (AD) is a neurodegenerative disease and the cause of 60–70% of cases of dementia. The most common early symptom is difficulty in remembering recent events. As the disease advances, symptoms can include problems wit ...
. Of one of which its proponents is Prof. Christopher Exley, who has published his findings. However, the Alzheimer's Association states that "studies have failed to confirm any role for aluminum in causing Alzheimer's." The link remains controversial.


Copper

Copper Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orang ...
provides the highest thermal conductivity among non-
noble metal A noble metal is ordinarily regarded as a metallic chemical element, element that is generally resistant to corrosion and is usually found in nature in its native element, raw form. Gold, platinum, and the other platinum group metals (ruthenium ...
s and is therefore fast
heat In thermodynamics, heat is energy in transfer between a thermodynamic system and its surroundings by such mechanisms as thermal conduction, electromagnetic radiation, and friction, which are microscopic in nature, involving sub-atomic, ato ...
ing with unparalleled heat distribution ''(see: Copper in heat exchangers).'' Pots and pans are cold-formed from copper sheets of various thicknesses, with those in excess of 2.5 mm considered commercial (or ''extra-fort'') grade. Between 1 mm and 2.5 mm wall thickness is considered utility (''fort'') grade, with thicknesses below 1.5 mm often requiring tube beading or edge rolling for reinforcement. Less than 1mm wall thickness is generally considered decorative, with exception made for the case of .75–1 mm planished copper, which is hardened by hammering and therefore expresses performance and strength characteristic of thicker material. Copper thickness of less than .25 mm is, in the case of cookware, referred to as
foil Foil may refer to: Materials * Foil (metal), a quite thin sheet of metal, usually manufactured with a rolling mill machine * Metal leaf, a very thin sheet of decorative metal * Aluminium foil, a type of wrapping for food * Tin foil, metal foil ma ...
and must be formed to a more structurally rigid metal to produce a serviceable vessel. Such applications of copper are purely aesthetic and do not materially contribute to cookware performance. Copper is reactive with acidic foods which can result in corrosion, the byproducts of which can foment copper toxicity. In certain circumstances, however, unlined copper is recommended and safe, for instance in the preparation of
meringue Meringue ( , ) is a type of dessert or candy, of French cuisine, French origin, traditionally made from Whisk, whipped egg whites and sugar, and occasionally an acid, acidic ingredient such as lemon, vinegar, or potassium bitartrate, cream of t ...
, where copper ions prompt proteins to denature (unfold) and enable stronger protein bonds across the sulfur contained in egg whites. Unlined copper is also used in the making of preserves, jams and jellies. Copper does not store ("bank") heat, and so thermal flows reverse almost immediately upon removal from heat. This allows precise control of consistency and texture while cooking sugar and pectin-thickened preparations. Alone, fruit acid would be sufficient to cause leaching of copper byproducts, but naturally occurring fruit sugars and added preserving sugars buffer copper reactivity. Unlined pans have thereby been used safely in such applications for centuries. Lining copper pots and pans prevents copper from contact with
acid An acid is a molecule or ion capable of either donating a proton (i.e. Hydron, hydrogen cation, H+), known as a Brønsted–Lowry acid–base theory, Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis ...
ic foods. The most popular lining types are tin,
stainless steel Stainless steel, also known as inox, corrosion-resistant steel (CRES), or rustless steel, is an iron-based alloy that contains chromium, making it resistant to rust and corrosion. Stainless steel's resistance to corrosion comes from its chromi ...
,
nickel Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slo ...
and
silver Silver is a chemical element; it has Symbol (chemistry), symbol Ag () and atomic number 47. A soft, whitish-gray, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. ...
. The use of tin dates back many centuries and is the original lining for copper cookware. Although the patent for
canning Canning is a method of food preservation in which food is processed and sealed in an airtight container (jars like Mason jars, and steel and tin cans). Canning provides a shelf life that typically ranges from one to five years, although under ...
in sheet tin was secured in 1810 in England, legendary French chef
Auguste Escoffier Georges Auguste Escoffier (; 28 October 1846 – 12 February 1935) was a French chef, restaurateur, and culinary writer who popularised and updated traditional French cooking methods. Much of Escoffier's technique was based on that of Marie-A ...
experimented with a solution for provisioning the French army while in the field by adapting the tin lining techniques used for his cookware to more robust steel containers (then only lately introduced for canning) which protected the cans from corrosion and soldiers from lead solder and
botulism Botulism is a rare and potentially fatal illness caused by botulinum toxin, which is produced by the bacterium ''Clostridium botulinum''. The disease begins with weakness, blurred vision, Fatigue (medical), feeling tired, and trouble speaking. ...
poisoning. Tin linings sufficiently robust for cooking are wiped onto copper by hand, producing a .35–45-mm-thick lining. Decorative copper cookware, i.e., a pot or pan less than 1 mm thick and therefore unsuited to cooking, will often be electroplate lined with tin. Should a wiped tin lining be damaged or wear out the cookware can be re-tinned, usually for much less cost than the purchase price of the pan. Tin presents a smooth crystalline structure and is therefore relatively non-stick in cooking applications. As a relatively soft metal abrasive cleansers or cleaning techniques can accelerate wear of tin linings. Wood, silicone or plastic implements are to preferred over harder stainless steel types. For a period following the Second World War, copper cookware was electroplated with a nickel lining. Nickel is harder and more thermally efficient than tin, with a higher melting point. Despite its hardness, it wore out as fast as tin, as the plating was 20 microns thick or less, as nickel tends to plate somewhat irregularly, and requires milling to produce an even cooking surface. Nickel is also stickier than tin or silver. Copper cookware with aged or damaged nickel linings can be retinned, or possibly replating with nickel, although this is no longer widely available. Nickel linings began to fall out of favor in the 1980s owing to the isolation of nickel as an allergen. Silver is also applied to copper by means of electroplating, and provides an interior finish that is at once smooth, more durable than either tin or nickel, relatively non-stick and extremely thermally efficient. Copper and silver bond extremely well owing to their shared high electro-conductivity. Lining thickness varies widely by maker, but averages between 7 and 10 microns. The disadvantages of silver are expense and the tendency of sulfurous foods, especially brassicas, to discolor. Worn silver linings on copper cookware can be restored by stripping and re-electroplating. Copper cookware lined with a thin layer of stainless steel is available from most modern European manufacturers. Stainless steel is 25 times less thermally conductive than copper, and is sometimes critiqued for compromising the efficacy of the copper with which it is bonded. Among the advantages of stainless steel are its durability and corrosion resistance, and although relatively sticky and subject to food residue adhesions, stainless steel is tolerant of most abrasive cleaning techniques and metal implements. Stainless steel forms a pan's structural element when bonded to copper and is irreparable in the event of wear or damage. Using modern metal bonding techniques, such as cladding, copper is frequently incorporated into cookware constructed of primarily dissimilar metal, such as stainless steel, often as an enclosed diffusion layer (see ''coated and composite cookware'' below).


Cast iron

Cast-iron cookware is slow to heat, but once at temperature provides even heating. Cast iron can also withstand very high temperatures, making cast iron pans ideal for searing. Being a reactive material, cast iron can have
chemical reaction A chemical reaction is a process that leads to the chemistry, chemical transformation of one set of chemical substances to another. When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an Gibbs free energy, ...
s with high acid foods such as
wine Wine is an alcoholic drink made from Fermentation in winemaking, fermented fruit. Yeast in winemaking, Yeast consumes the sugar in the fruit and converts it to ethanol and carbon dioxide, releasing heat in the process. Wine is most often made f ...
or
tomato The tomato (, ), ''Solanum lycopersicum'', is a plant whose fruit is an edible Berry (botany), berry that is eaten as a vegetable. The tomato is a member of the nightshade family that includes tobacco, potato, and chili peppers. It originate ...
es. In addition, some foods (such as
spinach Spinach (''Spinacia oleracea'') is a leafy green flowering plant native to Central Asia, Central and Western Asia. It is of the order Caryophyllales, family Amaranthaceae, subfamily Chenopodioideae. Its leaves are a common vegetable consumed eit ...
) cooked on bare cast iron will turn black.
Cast iron Cast iron is a class of iron–carbon alloys with a carbon content of more than 2% and silicon content around 1–3%. Its usefulness derives from its relatively low melting temperature. The alloying elements determine the form in which its car ...
is a somewhat brittle, porous material that rusts easily. As a result, it should not be dropped or heated unevenly and it typically requires
seasoning Seasoning is the process of supplementing food via herbs, spices, and/or salts, intended to enhance a particular flavour. General meaning Seasonings include herbs and spices, which are themselves frequently referred to as "seasonings". Salt may ...
before use. Seasoning creates a thin layer of oxidized
fat In nutrition science, nutrition, biology, and chemistry, fat usually means any ester of fatty acids, or a mixture of such chemical compound, compounds, most commonly those that occur in living beings or in food. The term often refers specif ...
over the iron that coats and protects the surface from corrosion, and prevents sticking. Enameled cast-iron cookware was developed in the 1920s. In 1934, the French company
Cousances Cousances was a brand of enameled cast iron Cookware and bakeware, cookware ("cocotte" in French). originally manufactured by a foundry in the town of Cousances-les-Forges in northeastern France. The Cousances foundry began making cast iron pans ...
designed the enameled cast iron Doufeu to reduce excessive evaporation and scorching in cast iron Dutch ovens. Modeled on old braising pans in which glowing charcoal was heaped on the lids (to mimic two-fire ovens), the Doufeu has a deep recess in its lid which instead is filled with ice cubes. This keeps the lid at a lower temperature than the pot bottom. Further, little notches on the inside of the lid allow the moisture to collect and drop back into the food during the cooking. Although the Doufeu (literally, "gentlefire") can be used in an oven (without the ice, as a casserole pan), it is chiefly designed for stove top use. Enameled cast-iron cookware, unlike uncoated cast-iron, is minimally reactive thus can be used with acidic food.


Stainless steel

Stainless steel Stainless steel, also known as inox, corrosion-resistant steel (CRES), or rustless steel, is an iron-based alloy that contains chromium, making it resistant to rust and corrosion. Stainless steel's resistance to corrosion comes from its chromi ...
is an iron alloy containing a minimum of 11.5% chromium. Blends containing 18% chromium with either 8% nickel, called 18/8, or with 10% nickel, called 18/10, are commonly used for kitchen cookware. Stainless steel's virtues are resistance to corrosion, non-reactivity with either alkaline or acidic foods, and resistance to scratching and denting. Stainless steel's drawbacks for cooking use include its relatively poor thermal conductivity. Since the material does not adequately spread the heat itself, stainless steel cookware is generally made as a cladding of stainless steel on both sides of an aluminum or copper core to conduct the heat across all sides, thereby reducing "hot spots", or with a disk of copper or aluminum on just the base to conduct the heat across the base, with possible "hot spots" at the sides. Typical 18/10 stainless steel also has a relatively low
magnetic permeability In electromagnetism, permeability is the measure of magnetization produced in a material in response to an applied magnetic field. Permeability is typically represented by the (italicized) Greek letter ''μ''. It is the ratio of the magnetic ...
, making it incompatible with induction cooktops. Recent developments have allowed the production of
ferromagnetic Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet. Ferromagne ...
18/10 alloys with a higher permeability. In so-called "tri-ply" cookware, the central aluminum layer is paramagnetic, and the interior 18/10 layer may also, but the exterior layer at the base must be ferromagnetic to be compatible with induction cooktops. Stainless steel does not require seasoning to protect the surface from rust, but may be seasoned to provide a non-stick surface.


Carbon steel

Carbon-steel cookware can be rolled or hammered into relatively thin sheets of dense material, which provides robust strength and improved heat distribution. Carbon steel accommodates high, dry heat for such operations as dry searing. Carbon steel does not conduct heat efficiently, but this may be an advantage for larger vessels, such as woks and
paella Paella (, , , , ; ) is a rice dish originally from the Valencian Community. ''Paella'' is regarded as one of the community's identifying symbols. It is one of the best-known dishes in Spanish cuisine. The dish takes its name from the wide, sha ...
pans, where one portion of the pan is intentionally kept at a different temperature than the rest. Like cast iron, carbon steel must be seasoned before use, usually by rubbing a fat or oil on the cooking surface and heating the cookware on the stovetop or in the oven. With proper use and care, seasoning oils polymerize on carbon steel to form a low-tack surface, well-suited to browning, Maillard reactions and easy release of fried foods. Carbon steel will easily rust if not seasoned and thoroughly dried after cleaning, and should be stored seasoned to avoid rusting. Carbon steel is traditionally used for
crêpe A crêpe or crepe ( or , , ) is a dish made from unleavened batter or dough that is cooked on a frying pan or a griddle. Crêpes are usually one of two varieties: ''sweet crêpes'' () or ''savoury galettes'' (). They are often served ...
and fry pans, as well as woks.


Clad aluminium or copper

Cladding is a technique for fabricating pans with a layer of efficient heat conducting material, such as copper or aluminum, covered on the cooking surface by a non-reactive material such as stainless steel, and often covered on the exterior aspect of the pan ("dual-clad") as well. Some pans feature a copper or aluminum interface layer that extends over the entire pan rather than just a heat-distributing disk on the base. Generally, the thicker the interface layer, especially in the base of the pan, the more improved the heat distribution. Claims of
thermal efficiency In thermodynamics, the thermal efficiency (\eta_) is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, steam turbine, steam engine, boiler, furnace, refrigerator, ACs etc. For ...
improvements are, however, controversial, owing in particular to the limiting and heat-banking effect of stainless steel on thermal flows. Aluminum is typically clad on both the inside and the exterior pan surfaces, providing both a stainless cooking surface and a stainless surface to contact the cooktop. Copper of various thicknesses is often clad on its interior surface only, leaving the more attractive copper exposed on the outside of the pan (see Copper above). Some cookware use a dual-clad process, with a thin stainless layer on the cooking surface, a thick core of aluminum to provide structure and improved heat diffusion, and a foil layer of copper on the exterior to provide the "look" of a copper pot at a lower price.


Coating


Enamel over steel

Enameled cast iron Heavy-duty cookware made of cast iron is valued for its heat retention, durability, ability to maintain high temperatures for longer time duration, and non-stick cooking when properly seasoned. Seasoning is also used to protect bare cast iron ...
cooking vessels are made of cast iron covered with a porcelain surface. This creates a piece that has the heat distribution and retention properties of cast iron combined with a non-reactive, low-stick surface. Such pots are much lighter than most other pots of similar size, are cheaper to make than stainless steel pots, and do not have the rust and reactivity issues of cast iron or carbon steel. Enamel over steel is ideal for large stockpots and for other large pans used mostly for water-based cooking. Because of its light weight and easy cleanup, enamel over steel is also popular for cookware used while camping.


Seasoning

Seasoning Seasoning is the process of supplementing food via herbs, spices, and/or salts, intended to enhance a particular flavour. General meaning Seasonings include herbs and spices, which are themselves frequently referred to as "seasonings". Salt may ...
is the process of treating the surface of a cooking vessel with a dry, hard, smooth,
hydrophobic In chemistry, hydrophobicity is the chemical property of a molecule (called a hydrophobe) that is seemingly repelled from a mass of water. In contrast, hydrophiles are attracted to water. Hydrophobic molecules tend to be nonpolar and, thu ...
coating formed from polymerized fat or oil. When seasoned surfaces are used for cookery in conjunction with oil or fat a stick-resistant effect is produced. Some form of post-manufacturing treatment or end-user seasoning is mandatory on cast-iron cookware, which
rust Rust is an iron oxide, a usually reddish-brown oxide formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture. Rust consists of hydrous iron(III) oxides (Fe2O3·nH2O) and iron(III) oxide-hydroxide (FeO(OH) ...
s rapidly when heated in the presence of available oxygen, notably from water, even small quantities such as drippings from dry meat. Food tends to stick to unseasoned iron and
carbon steel Carbon steel is a steel with carbon content from about 0.05 up to 2.1 percent by weight. The definition of carbon steel from the American Iron and Steel Institute (AISI) states: * no minimum content is specified or required for chromium, cobalt ...
cookware, both of which are seasoned for this reason as well. Other cookware surfaces such as stainless steel or cast aluminium do not require as much protection from corrosion but seasoning is still very often employed by professional chefs to avoid sticking. Seasoning of other cookware surfaces is generally discouraged. Non-stick enamels often crack under heat stress, and non-stick polymers (such as Teflon) degrade at high heat so neither type of surface should be seasoned.


PTFE non-stick

Steel or aluminum cooking pans can be coated with a substance such as
polytetrafluoroethylene Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene, and has numerous applications because it is chemically inert. The commonly known brand name of PTFE-based composition is Teflon by Chemours, a corporate spin-of ...
(PTFE, often referred to with the
genericized trademark A generic trademark, also known as a genericized trademark or proprietary eponym, is a trademark or brand name that, because of its popularity or significance, has become the generic term for, or synonymous with, a general class of products or ...
Teflon) in order to minimize food sticking to the pan surface. There are advantages and disadvantages to such a coating. Coated pans are easier to clean than most non-coated pans, and require little or no additional oil or fat to prevent sticking, a property that helps to produce lower fat food. On the other hand, some sticking is required to cause sucs to form, so a non-stick pan cannot be used where a pan sauce is desired. Non-stick coatings tend to degrade over time and are susceptible to damage. Using metal implements, harsh scouring pads, or chemical abrasives can damage or destroy cooking surface. Non-stick pans must not be overheated. The coating is stable at normal cooking temperatures, even at the smoke point of most oils. However, if a non-stick pan is heated while empty its temperature may quickly exceed , above which the non-stick coating may begin to deteriorate, changing color and losing its non-stick properties.


Diamond over carbon steel

Vacuum-brazed diamond cookware is produced by bonding
diamond Diamond is a Allotropes of carbon, solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond is tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of e ...
particles to a
carbon steel Carbon steel is a steel with carbon content from about 0.05 up to 2.1 percent by weight. The definition of carbon steel from the American Iron and Steel Institute (AISI) states: * no minimum content is specified or required for chromium, cobalt ...
base using a high-temperature (approximately 850–950 °C) vacuum brazing process. This technique is intended to minimize
oxidation Redox ( , , reduction–oxidation or oxidation–reduction) is a type of chemical reaction in which the oxidation states of the reactants change. Oxidation is the loss of electrons or an increase in the oxidation state, while reduction is ...
while creating a durable, scratch-resistant surface. Diamond’s high
thermal conductivity The thermal conductivity of a material is a measure of its ability to heat conduction, conduct heat. It is commonly denoted by k, \lambda, or \kappa and is measured in W·m−1·K−1. Heat transfer occurs at a lower rate in materials of low ...
(900–2320 W/mK) promotes rapid and even heat distribution, which can be advantageous for high-heat cooking methods such as searing and stir-frying. Hydrogen termination of the diamond particles may further enhance non-stick properties by increasing surface hydrophobic, hydrophobicity,Kaibara, Yu, Kenta Sugata, Minoru Tachiki, Hitoshi Umezawa, and Hiroshi Kawarada. "Control wettability of the hydrogen-terminated diamond surface and the oxidized diamond surface using an atomic force microscope." Diamond and Related Materials 12.3-7 (2003): 560–564. and in some designs, silicone resin fillers are used to improve coating integrity. Although it is marketed as a robust alternative to conventional non-stick surface, non-stick finishes, its long-term durability remains under study.


Non-metallic cookware

Non-metallic cookware can be used in both conventional and microwave ovens. Non-metallic cookware typically can not be used on the stovetop, with the exception of glass-ceramic cookware. Rigid non metallic cookware tends to shatter on sudden cooling or uneven heating, although low expansion materials such as borosilicate glass and glass-ceramics have significant immunity.


Pottery

Pottery has been used to make cookware from before dated history. Clay pot cooking, Pots and pans made with this material are durable (some could last a lifetime or more) and are inert and non-reactive. Heat is also conducted evenly in this material. They can be used for both cooking in a fire pit surrounded with coals and for baking in the oven.


Ceramics

Ceramic glaze, Glazed ceramics, such as porcelain, provide a nonstick cooking surface. Historically some glazes used on ceramic articles contained levels of lead, which can possess health risks; although this is not a concern with the vast majority of modern ware. Some pottery can be placed on fire directly.


Glass

Borosilicate glass is safe at oven temperatures. The clear glass also allows for the food to be seen during the cooking process. However, it cannot be used on a stovetop, as it cannot cope with stovetop temperatures.


Glass-ceramic

Glass ceramic is used to make products such as Corningware and Pyroflam, which have many of the best properties of both glass and ceramic cookware. While Pyrex can shatter if taken between extremes of temperature too rapidly, glass-ceramics can be taken directly from deep freeze to the stove top. Their very low coefficient of thermal expansion makes them less prone to thermal shock.


Stone

A natural stone can be used to diffuse heat for indirect grilling or baking, as in a baking stone or pizza stone, or the French ''pierrade''.


Silicone

Silicone bakeware is light, flexible and able to withstand sustained temperatures of 220 °C (428 °F). It melts around 500 °C (930 °F), depending upon the fillers used. Its flexibility is advantageous in removing baked goods from the pan. This rubbery material should not be confused with the silicone resin used to make hard, shatterproof children's dishware, which is not suitable for baking.


Types of cookware and bakeware

The size and shape of a cooking vessel is typically determined by how it will be used. Intention, application, technique and configuration also have a bearing on whether a cooking vessel is referred to as a pot or a pan. Generally within the classic ''batterie de cuisine'' a vessel designated "pot" is round, has "ear" handles in diametric opposition, with a relatively high height to cooking surface ratio, and is intended for liquid cooking such as stewing, stocking, brewing or boiling. Vessels with a long handle or ear handles, a relatively low height to cooking surface ratio, used for frying, searing, reductions, braising and oven work take the designation "pan". Additionally, while pots are round, pans may be round, oval, squared, or irregularly shaped.


Cookware

* Braising pans and roasting pans (also known as "braisers", "roasters" or rondeau pans) are large, wide and shallow, to provide space to cook a roast (chicken, beef or pork). They typically have two loop or tab handles, and may have a cover. Roasters are usually made of heavy-gauge metal so that they may be used safely on a cooktop following roasting in an oven. Unlike most other cooking vessels, roasters are usually rectangular or oval. There is no sharp boundary between braisers and roasters – the same pan, with or without a cover, can be used for both functions. In Europe, clay roasters remain popular because they allows roasting without adding grease or liquids. This helps preserve flavor and nutrients. Having to soak the pot in water for 15 minutes before use is a notable drawback. * Casserole pots (for making casseroles) resemble roasters and Dutch ovens, and many recipes can be used interchangeably between them. Depending on their material, casseroles can be used in ovens or on stovetops. Casseroles are often made of metal, but are popular in glazed ceramic or other vitreous material as well. * Dilipots are long thin pots created to sanitize with boiling water. *
Dutch oven A Dutch oven, Dutch pot (US English), or casserole dish (international) is a thick-walled cooking pot with a tight-fitting lid. Dutch ovens are usually made of seasoned cast iron; however, some Dutch ovens are instead made of cast aluminium, or ...
s are heavy, relatively deep pots with heavy lids, designed to re-create oven conditions on stovetops or campfires. They can be used for stews, braising, braised meats, soups and a large variety of other dishes that benefit from low-heat, slow cooking. Dutch ovens are typically made from cast iron cookware, cast iron or Clay pot cooking, natural clay and are sized by volume. * A Wonder Pot, wonder pot, an Israeli invention, acts as a Dutch oven but is made of aluminium. It consists of three parts: an aluminium pot shaped like a Bundt pan, a hooded cover perforated with venting holes, and a thick, round, metal disc with a centre hole that is placed between the wonder pot and the flame to disperse heat. * Frying pans, frypans or skillets provide a large flat heating surface and shallow, sloped sides, and are best for pan frying. Frypans with shallow, rolling slopes are sometimes called omelette pans. Grill pans are frypans that are ribbed, to let fat drain away from the food being cooked. Frypans and grill pans are generally sized by diameter (20–30 cm). * Spiders are skillets with three thin legs to keep them above an open fire. Ordinary flat-bottomed skillets are also sometimes called spiders, though the term has fallen out of general use. * Griddles are flat plates of metal used for frying, grilling and making pan breads such as pancakes, injera, tortillas, chapatis and crepes. Traditional iron griddles are circular, with a semicircular hoop fixed to opposite edges of the plate and rising above it to form a central handle. Rectangular griddles that cover two stove burners are now also common, as are griddles that have a ribbed area that can be used like a grill pan. Some have multiple square metal grooves enabling the contents to have a defined pattern, similar to a waffle maker. Like frypans, round griddles are generally measured by diameter (20–30 cm). ** In Scotland, griddles are referred to as ''girdles''. In some Spanish-speaking countries, a similar pan is referred to as a comal (cookware), ''comal''. Crepe pans are similar to griddles, but are usually smaller, and made of a thinner metal. * Both griddles and frypans can be found in electric versions. These may be permanently attached to a heat source, similar to a hot plate. * Saucepans are round, vertical-walled vessels used for simmering or boiling. Saucepans generally have one long handle. Larger pans of similar shape with two ear handles are sometimes called "sauce-pots" or "soup pots" (3–12 litres). Saucepans and saucepots are denominated by volume (usually 1–8 L). While saucepots often resemble Dutch ovens in shape, they are generally lighter. Very small saucepans used for heating milk are referred to as "milk pans" - such saucepans usually have a lip for pouring heated milk. ** A variation on the saucepan with sloping sides is called a "Windsor", "''evasee''" or "''fait-tout''", and is used for evaporative reducing. Saucepans with rounded sides are called "''sauciers''" which also provide more efficient evaporation and generate a return wave when shaken. Both flared saucepan variations tend to dry or cake preparations on their walls, and are less suited to starch-thickened sauces than standard saucepans. * Sauté pans, used for sautéing, have a large surface-area and relatively low sides to permit rapid evaporation and to allow the cook to toss the food. The word ''sauté'' comes from the French verb ''sauter'', meaning "to jump". Sauté pans often have straight vertical sides, but may also have flared or rounded sides. * Stockpots are large pots with sides at least as tall as their diameters. This allows stock (food), stock to simmer for extended periods of time without major reducing. Stockpots are typically measured in volume (6–36 L). Stock pots come in a large variety of sizes to meet any need from cooking for a family to preparing food for a banquet. A specific type of stockpot exists for lobsters, and Hispanic cultures use an all-metal stockpot, usually called a ''caldero'', to cook rice. * Woks are wide, roughly bowl (vessel), bowl-shaped vessels, with one or two handles at or near the rim. This shape allows a small pool of cooking oil in the centre of the wok to be heated to a high temperature using relatively little fuel, while the outer areas of the wok are used to keep food warm after it has been fried in the oil. In the Western world, woks are typically used only for stir-frying, but they can be used for anything from steaming to deep frying.


Bakeware

Bakeware is designed for use in the
oven upA double oven A ceramic oven An oven is a tool that is used to expose materials to a hot environment. Ovens contain a hollow chamber and provide a means of heating the chamber in a controlled way. In use since antiquity, they have been use ...
(for baking), and encompasses a variety of different styles of baking pans as cake pans, pie pans, and bread pans. * Cake tins (or cake pans in the US) include square pans, round pans, and speciality pans such as angel food cake pans and springform pans often used for baking cheesecake. Another type of cake pan is a muffin tin, which can hold multiple smaller cakes. * Sheet pans, cookie sheets, and Swiss roll tins are bakeware with large flat bottoms. * Pie pans are flat-bottomed flare-sided tins specifically designed for baking pies. File:Pyrex-roaster.jpg, A Pyrex chicken roaster File:Romertopf.jpg, ''Römertopf'' File:Wonder Pot cake.jpg, A Passover brownie cake baked in a Wonder Pot, wonder pot File:Pfanne (Antihaftbeschichtung).jpg, Large and small skillets File:Electric griddle.jpg, Electric griddle with temperature control File:copper-saucepot.jpg, A copper saucepot (stainless lined, with cast iron handles) File:Angel Food Cake Pan.JPG, Angel food cake pan File:Pizza crimped in a springform pan.jpg, A springform pan with pizza File:Moule à kouglof.JPG, A ''gugelhupf'' from Alsace, Unterlinden Museum


List of cookware and bakeware

* Comal (cookware) * Cookie sheet * Double boiler * Doufeu *
Dutch oven A Dutch oven, Dutch pot (US English), or casserole dish (international) is a thick-walled cooking pot with a tight-fitting lid. Dutch ovens are usually made of seasoned cast iron; however, some Dutch ovens are instead made of cast aluminium, or ...
* Food processor * Griddle (also called tava or tawa) * Karahi * Kazan (cookware), Kazan * Kettle * Pans ** Baking pan ** Chip pan ** Crepe pan (also called a tava) ** Frying pan ** Roasting pan ** Saucepan (described in current article) ** Sauté pan ** Sheet pan ** Splayed Sauté pan ** Springform pan ** Tube pan (types include angel food cake pan and Bundt cake [Kugelhopf] pan) * Pots ** Beanpot ** Cooking pot ** Stockpot ** Wonder Pot * Pressure cooker * Ramekin * Roasting rack * Saucier (described in current article) * Soufflé dish * Tajine * Wok


See also

* Cauldron * Food storage * Gastronorm sizes (standard sizes of food containers) * Kappabashi-dori * Kitchenware * :Kitchenware brands, Kitchenware brands * List of cooking vessels * List of food preparation utensils * Marc Grégoire * Multicooker * Pot-holder * Stoneware * Surface chemistry of cooking * Vacuum filler


References


Works cited

* * * * *


Further reading

* {{DEFAULTSORT:Cookware And Bakeware Cookware and bakeware,