These chocolate cupcakes have a surprise – an inner layer of peanut butter buttercream frosting underneath the outer chocolate coating! The cupcakes themselves are rich and moist. They contain many of the “standard” chocolate cupcake ingredients, including cocoa powder, sugar and buttermilk. The peanut butter buttercream (try saying that ten times fast!) goes on top once the cupcakes have baked and cooked. After the buttercream has a chance to set, dip the top of each cupcake in the homemade chocolate coating, then let it harden before serving. Surprise!
Source Serious Eats