A sheet of steel that is rigid and it is utilized for cooking snacks, breads, biscuits, etc. It generally features a number of sides that's turned up for simplicity in eliminating from oven. Kinds consist of shiny, heavy-gauge aluminum, the conventional used in most test kitchen areas even for cooking and browning. Darkened, heavy-gauge pans will produce especially sharp exterior crusts desired for specialty baked products. Insulated cooking sheets are two sheets of aluminum with air area between, and are usually specifically good-for soft snacks or tender-crust breads or rolls. Also, see Cookie sheet, Insulated bakeware, and Jelly roll pan glossary directories.