I would say you bake your sheet cakes, cut into strips the width you need for the size sponge bob you are making, and then stack them like a barrel cake. So, two layers, dowel, then stack two more layers, dowel, and so on until you get your height, then run 2 or 3 long dowels all the way through, evenly spaced across. I would think that would work. Hope that makes sense, it would be easier to draw you a picture but I can't .
2/16/14 at 7:35pm