Cookie sheets or baking sheets are commonly used to bake cookies. These are flat sheets made of metal, usually aluminum or steel, with a rimmed edge to prevent cookies from sliding off the sheet. Non-stick baking sheets are also available, which have a special coating that helps prevent cookies from sticking to the surface. Silicone baking mats are an alternative to traditional baking sheets that can provide even heat distribution and prevent cookies from sticking to the surface.