Twelve-Layer Mocha Cake. This cake has three different types of cake all rolled into one: A spongy yellow cake brushed with Kahlua, a chocolate souffl? cake and a meringue cake with a chopped chocolate hazlenut bar folded into the meringue before it's baked. Each of these cakes has two layers and they are all filled with either a coffee buttercream or a mocha buttercream. I frosted the entire cake with coffee buttercream and decorated it with buttercream violets. It was a little time consuming to make, but ohhhhh so worth it! :) I also included a picture after it was cut to try and show the different layers. TFL!