From Longman Dictionary of Contemporary Englishcookie sheetˈcookie sheet noun [countable] American English DFUa flat piece of metal that you bake food on SYN baking tray British English
Examples from the Corpus
cookie sheet• Put a cookie sheet on the oven rack during preheating.• Place on well-greased cookie sheet and flatten with spatula.• Set pie on cookie sheet and bake at 425 degrees 10 minutes.• Spray cookie sheet with non-stick cooking spray.• Drop by rounded teaspoons on to a greased non-stick cookie sheet.• When you covered the cookie sheet I with the towel, the sound was no longer reflected.• Bake on an ungreased cookie sheet for 12 to 15 minutes. 