Is Cookie Sheet dishwasher safe?
Sometimes — with care
Cookie sheets are generally not recommended for the dishwasher.
Why
Most cookie sheets are made of aluminum or steel, which can discolor or warp in the high heat and harsh detergents of a dishwasher. Nonstick coatings may also degrade over time. Hand washing preserves the sheet's performance and appearance.
How to wash it
Wash by hand with warm soapy water and a soft sponge. Dry immediately to prevent water spots or rust.
Last updated 2026-06-16. General guidance — always check your product’s care label. How we verify.