It’s just a flat piece of metal, so you’d think a cookie sheet couldn’t fail. In fact, we’ve seen them bake unevenly and warp, not to mention let cookies burn, stick, or spread into blobs. Cookie sheets come in many materials, sizes, thicknesses, and finishes, insulated or not, with rims or not. What would the best cookie sheets look like? Our previous favorite, bakes beautifully, but you have to buy it online or at restaurant supply stores. Is anybody making a quality cookie sheet for home bakers?
We gathered eight, including our previous winner, priced from $12 to $24, testing both single sheets and insulated versions. Manufacturers claim that insulated sheets heat more evenly and “allow virtually no chance of burning,” as one puts it. The air pocket between two layers of metal is designed to buffer heat, preventing hot spots and warping.