They are a thin piece of sponge cake on the botton. Over the top is a coffee (kahlua) mousse. They are in a hard chocolate shell.
I found ours to be dry and very unimpressive. They are a favorite here, but their build up was one of the reasons we left Boma so disappointed. After things like "one of the best desserts I've ever tasted" I was expecting something.......richer and fresher.
But what do I know, I don't like Krispy Kremes, either.