Bake a 1 1/2 batch of white cake in 2 buttered and paper-lined 10-inch pans. When cakes are cooled, peel off paper and position one layer right side up on a cardboard. Spread the layer with chocolate buttercream, then top with second layer upside down. Mask outside of cake with more buttercream, then press multicolored chocolate shavings made with milk and white chocolate against cake all around.
Recipe courtesy of Nick Malgieri