Why you bake a cake on cookie sheet?

* Shape: Cookie sheets are flat, while cakes need a more defined shape to rise properly. Using a cookie sheet will result in a thin, flat cake that won't have the desired texture.

* Even Baking: Cakes need to bake evenly, and the flat surface of a cookie sheet doesn't allow for proper heat distribution.

* Stickiness: Cakes can stick to the cookie sheet, making it difficult to remove and potentially damaging the cake.

Instead of a cookie sheet, you should use:

* Cake pans: These come in various sizes and shapes, specifically designed to hold and bake cakes.

* Springform pans: These pans have a removable bottom, making it easy to remove the cake once baked.

There are exceptions to this rule:

* Sheet cakes: These are specifically designed to be baked on a cookie sheet, and they are flatter and thinner than regular cakes.

* Some cookies: Some cookies, like bar cookies, are baked on a cookie sheet.

If you are planning on baking a cake, it's best to use a dedicated cake pan to ensure the best results.