I made this cupcake cake for my Uncle's 50th birthday party. It was spice cake (firmed up by using it as the base in the WASC recipe), frosted with buttercream. To make the cake square and still get a flat surface, I lined up the cupcakes and piped in icing in the spaces between the cupcakes. I smoothed it using the viva method and then applied an edible image to the center of the main cake.