I was watching the episode which they were making a life size race car and I saw buddy baking cakes in a sheet pan which were divided into two parts but it didn't look like cake batter separators (like stainless steel frames) I am not sure but it looked like they were baking the cakes in the top part (covers) of cardboard banker's boxes you know the ones for storing files! was I seeing things or what....could cakes be baked in cardboard???!!

I know that some loafs are made in a cardboard or cardboard like loaf. mainly to bake in a container to give but i have never seen a cake

When I worked for Albertsons, all the sheet cakes were baked in cardboard "pans"...lol...mind you- at a bakery plant somewhere far away and then shipped to us. Also, other items were baked in cardboard pans and we also used cardboard collars on the large individual cinnamon rolls. So it wouldn't be hard to imagine that they have been baking some cakes on that show in disposable pans.

http://www.plasticcontainercity.com/Baking_Molds.htm?gclid=CIfM3M-LyaYCFZJa2godr0veGg I FOUND THIS!

A commercial full sheet is 16" x 24". They are baked in 16" x 24" bakeable cardboard trays that fit into the Bun pans (flat surface portion) which are used during baking for support and handling purposes.

When baking cake, bakeable cardboard trays are used 25 1/4 x 17 5/8
http://www.newmethodpackaging......did=606125