"A sheet pan, also referred to as baking tray, baking sheet, or baking pan, is a flat, rectangular metal pan placed in an oven and used for baking pastries such as bread rolls, cookies, sheet cakes, Swiss rolls, and pizzas.
These pans, like all bakeware, can be made of a variety of materials. Originally made of sheet iron, today's baking trays are made of either aluminum or sheet steel that has been enameled or coated with PFAS.
Common features that may be found in sheet pans include: one or more flat edges to assist food removal, one or more raised edges (lips) to retain food, a contiguous rim to retain either food or shallow liquid, handles to assist in moving the pan into and out of the oven, a layer of insulation (typically air) designed to protect delicate food from burning (air bake pan), or perforations to aid in speeding cooking (pizza tray)." - (en.wikipedia.org 29.09.2023)
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