This Batman cake is made entirely of cupcakes to aid the mother in serving,as she was at a location where it was not handy to cut cake, especially around 4 year olds! I used the Magnolia Bakery recipe for vanilla cupcakes; squirted white chocolate mousse into each cupcake that was vanilla. Part of the cupcakes consisted of chocolate cake, also a Magnolia Bakery recipe, which I filled with chocolate chips prior to baking. The best cake(s) ever! "Big kids" and the little ones fought over seconds!