The cake is covered in marshmallow fondant as well as the bow on the top. In order to get the edges of the cake to look so crisp, I roll out fondant to fit the sizes of the cake (so four of each size, 6x6x4 for the top, 8x8x4 for the middle, and 10x10x4 for the bottom). Then, I let those rectangles dry so that they are hardened. Then I simply adhere the hardened sides of fondant to the cake with buttercream or water and decorate. It weighed 25 pounds!