This recioe is from Cooking Light Magazine
10 ounces cake flour (about 2 1/2 cups)
3 tablespoons unsweetened cocoa
1 teaspoon baking soda
1 teaspoon baking powder
1 teaspoon kosher salt
1 1/2 cups granulated sugar
6 tablespoons unsalted butter, softened
2 large eggs
1 1/4 cups nonfat buttermilk
1 1/2 teaspoons white vinegar
1 1/2 teaspoons vanilla extract
2 tablespoons red food coloring (about 1 ounce)
5 tablespoons butter, softened
4 teaspoons nonfat buttermilk
1 (8ounce) block cream cheese, softened
3 1/2 cups powdered sugar (about 1 pound)
1 1/4 teaspoons vanilla extract
Preheat oven to 350.
To prepare the cupcakes, place 30 paper muffin cuo liners in muffin cups, coat with cooking spray.
Weigh or lightly spoon cake flour into dry measuring cups; level with a knife. Combine cake flour, unsweetened cocoa, baking soda, baking powder, and salt in a medium bowl; stir with a whisk. Place granulated sugar and unsalted butter in a large bowl; beat with a mixer at medium speed until well blended (about 3 minutes). Add eggs, 1 at a time, beating well after each addition. Add flour mixture and 1 1/4 cups nonfat buttermilk alternately to sugar mixture, beginning and ending with flour mixture. Add white vinegar, 1 1/2 teaspoons vanilla, and food coloring; beat well.
Spoon batter into prepared muffin cups. Bake at 350 for 20 minutes or until a wooden pick inserted in center comes out clean. Cool in pan 10 minutes on wire rack; remove from pan. Cool completely on wire racks.
To prepare frosting, beat 5 tablespoons butter, 4 teaspoons nonfat buttermilk and cream cheese with a mixer at high speed until fluffy. Gradually add powdered sugar; beat until smooth. Add 1 1/4 teaspoons vanilla; beat well. Spread frosting evenly over cupcakes.