Mocha cupcakes combine chocolate and coffee in delightful fashion. Made with butter and melted dark chocolate, these cupcakes are incredibly rich tasting, with just a hint of coffee flavor in the cupcakes and the luscious cream cheese frosting that’s piped (or spread, as desired) over the tops. The cupcakes can be baked a few days before decorating. Finish each one with a dusting of cocoa powder and a chocolate-covered espresso bean.