This recipe is adopted from a recipe for Flag Cake by the Barefoot Contessa. I made it for 4th of July 2009 and it was probably the best cake I've ever made. I don't usually like cream cheese frosting, but this one is divine, especially with the fresh berries on top.
A few months later I found cupcakes topped with raspberries and blueberries at Star Provisions' bakery in Atlanta, and I could swear they used this same recipe, though Annie Quatrano might beg to differ. That's what gave me the idea to make cupcakes with the Flag Cake recipe. The cake batter includes sour cream, which makes the cake SO moist and delicious. I've tried substituting 1/2 cup of Splenda for half a cup of the sugar in the batter and they came our great, so you could experiment with substituting Splenda for even more of the sugar.