This cake is a half sheet of white cake with Vanilla buttercream frosting as the main cake. Then to give a 3-D effect I baked a 9x13 inch white cake at a slant to make the Sponge Bob pop out. I used a color scheme thet went from yellow to light green to green to teal to blue to look similar to the invitation (shown) along with the colors of Spnge Bob himself. This cake was a lot of fun :)