I made a cake mix doctor recipe, it was a yellow cake mix with a box of pudding added,etc. well, everything looked fine, but as my cakes cooled they totally fell! any one have an idea of what i could have done? all i can think is i overbeat the cake. my husband liked the taste of it and wants it for his birthday, but i'm afraid to make it! also, would this type of mix hold up in the wilton wondermold pan? thanks for any advise

Sounds as though it was not cooked enough in the middle. Did you try using a the baking strips around the pan, a heating core or flower nail?

Could be the sour cream...will do it sometimes.