Why do cakes sink ? How to fix a sunken cake without wasting any part of the cake and cover it seamlessly in white chocolate ganache. if you have ever baked a cake and it sank, or it is under baked in the middle,you would understand perfectly how annoying it can be especially when you have leveled the cake and waste the top part. this video teaches you how to work wit a cake than sank in the middle because it is undercooked or under baked or just not baked in the middle