Share a little about the materials, processes, and techniques used to create this cake Buttercream beneath the fondant. 7 inch cakes 6 layers total. What are you most proud of? That I was able to cover it with filling inside and the filling didn't leach out of the buttercream and destroy the fondant. What advice would you give someone starting this project? Take your time make sure to cover the cake evenly with buttercream and make the dam of buttercream for the fill high enough so that the filling does not spill over.