I was asked to make this huge cake for our squadron's Change of Command today. I used 4-12 inch square pans and butted the cakes together (2 chocolate, 2 white) to make this huge cake. I had my husband cut a cake board for me out of plywood to ensure that is would support the weight of the cake.
I am NOT a fan of fondant, so I make rolled buttercream. I iced the cake in buttercream, and then used the rolled buttercream for the "Olaf" a.k.a. Ugly Angel. I was pleased with how this all turned out!