This video demonstrates how to make a topsy turvy cake. This is a very hard cake to make and requires some previous baking experience. He bakes a cake first and layers them using icing as a glue. He makes sure the cake is semi-frozen first before he starts carving it to be the base of the cake. After he is done carving, he covers the cake with icing. If you follow the rest of the steps in this video, you'll have a beautiful topsy turvy cake.