Chocolate lovers will dig these chocolate-rich cupcakes featuring a batter that's made with cocoa and flaked coconut. To make the frosting, white chocolate is melted with butter in a double boiler. After spreading it on top of the cupcakes, they're decorated with sprinkles. You could also finish them with finely chopped nuts or milk chocolate shavings. Store them for up to three days at room temperature in an airtight container.