You don't even have to have a wedding cake if you don't want to. It's nice to have something to cut together (although in Bavaria, the couple saw through a log together — so that's something to bear in mind!), but wedding cakes are expensive and if you're cutting costs, this is a quick way to do it. Consider a cheese wheel or one small cake to cut together, and the offer other sweet treats. Or go for a French classic — the croquembouche.