Remember how I said I needed to use up the leftover icing in my last post? Voila! Chocolate cupcakes iced with the leftover Chocolate Buttercream and decorated with leftover Vanilla Buttercream. The cupcake recipe is from Martha Stewart’s site, though I substituted plain lowfat Greek-style yogurt for the sour cream. The cake was moist and dense and not overly sweet — the perfect foil for the icing. Sooooo good.