Usually an hour if it's from a box at the store, 2 hours or 2 1/2 hours if your making it from scratch and 1-2 days if you making a stacker cake or topsy turvey cake. I made a 3 stack layer if cake and it was beautiful and I'm 13! Lol but over night it was hot and started sliding off and it all collapsed but then I made another and it took another day! Lol hope this was helpful!(:
Depending on what kind/type of cake.. The original cake would take 30 to 50 minutes to bake while the rawness is cooked.. And if your saying baking a cake at a time like 2 in the oven or 1 and after that one is cooked take the other pan in the oven then I would say an hour in a half.. but if your actually making it from scrap I would definitely say hours to make it..