It's not so bad that I can't level it out, or even work with it as-is, but I'm very concerned about discovering raw cake when it is sliced to serve. Does a fallen center necessarily mean raw cake? Or is it possible the recipe just doesn't have the strength to support itself at 12"? It was originally a cupcake recipe, but I use it for 10" cakes without problems.
Is there a way to determine whether this thing is cooked?