Chocolaty cupcakes that will make your taste buds smile! For the cupcake batter, this recipe uses a German chocolate cake mix. The recipe also calls for a lot of sour cream, 16 ounces, which results in a batter that's thick and creamy; resembling a thick mousse. All that sour cream gives the cupcakes a rich flavor and creates a very moist and tender texture. These moist morsels are then topped with a delicious made-from-scratch chocolate buttercream that has a smooth, fluffy texture, and rich chocolate flavor. Instead of using cocoa powder, this buttercream gets it's chocolate flavor from melted dark chocolate...it takes a little bit of extra effort, but it's definitely worth it! These tasty treats elicit delight wherever they appear, and no one ever believes they started with a mix.