cookie sheet

US /ˈkʊk.i ˌʃiːt/
UK /ˈkʊk.i ˌʃiːt/
"cookie sheet" picture
1.

a flat metal tray on which cookies or other food are baked

:
She placed the dough on the cookie sheet and put it in the oven.
Make sure to grease the cookie sheet before baking.