I’ve heard from other parents that the rainbow cake can be a nightmare – too much cake. If you slice it thin so it’s a reasonable amount of cake, it falls apart, if you split the layers so each kid gets 2 or 3, kids complain they didn’t get the colors they wanted. Then you have this awkwardly tall leftover cake hanging around. Well, the state of Maryland has a solution for you. I baked a rainbow cake, Smith Island Style (with white chocolate icing) and it worked on 8 levels.