My daughter really wanted a BOB Cake from Monsters vs Aliens for her birthday party. I had to create my own BOB by using 2 different cake pans. I used 2 8in. circle cakes for the bottom and the Classic Wonder Mold pan for the top. I had to use 2 boxes of cake mix for the Wonder Mold pan to make it fill the pan enough.
I used one box for the two bottoms ones. I used buttercream icing colored blue between cake layers and to cover the whole cake. I used more icing at the bottom of the cake to give it the blobby look. I had to make the wrinkles with my fingers. I used buttercream icing for the mouth and eye as well. I used the Wilton sparkle gel to cover the cake (except for the mouth and eye) to give it a translucent look.
This was an easy cake to make and the kids all loved it.