Watermelon Cake Hahah. Now I live in the south. So, let's just say.... I've seen a lot of things done with watermelons. Vodka poured in them so they are vodka melons. I've seen shapes, sizes. Oh... The things you can do with a watermelon.... are endless and a bit crazy. But.... I've never see a watermelon cake. (A cake that looks like a watermelon but is actually a cake.) This must be from a northerner. Hehehehe.