Lemonade Layer Cake

Cake
* 1 1/3 cups granulated sugar
* 6 tablespoons butter, softened
* 1 tablespoon grated lemon rind
* 3 tablespoons thawed lemonade concentrate
* 2 teaspoons vanilla extract
* 2 large eggs
* 2 large egg whites
* 2 cups all-purpose flour
* 1 teaspoon baking powder
* 1/2 teaspoon salt
* 1/2 teaspoon baking soda
* 1 1/4 cups fat-free buttermilk
* Cooking spray



Frosting
* 2 tablespoons butter, softened
* 2 teaspoons grated lemon rind
* 2 teaspoons thawed lemonade concentrate
* 1/2 teaspoon vanilla extract
* 8 ounces 1/3-less-fat cream cheese
* 3 1/2 cups powdered sugar


Preparation

Preheat oven to 350°.

To prepare cake, place first 5 ingredients in a large bowl; beat with a mixer at medium speed until well blended (about 5 minutes). Add eggs and egg whites, 1 at a time, beating well after each addition. Lightly spoon flour into dry measuring cups; level with a knife. Combine flour, baking powder, salt, and baking soda; stir well with a whisk. Add flour mixture and buttermilk alternately to sugar mixture, beginning and ending with flour mixture; beat well after each addition.

Pour batter into 2 (9-inch) round cake pans coated with cooking spray; sharply tap pans once on counter to remove air bubbles. Bake at 350° for 20 minutes or until wooden pick inserted in center comes out clean. Cool in pans 10 minutes on a wire rack; remove from pans. Cool completely on wire rack.

To prepare frosting, place 2 tablespoons butter and the next 4 ingredients (2 tablespoons butter through cream cheese) in a large bowl; beat with a mixer at high speed until fluffy. Add powdered sugar, and beat at low speed just until blended (do not overbeat). Chill 1 hour.

Place 1 cake layer on a plate; spread with 1/2 cup frosting. Top with remaining cake layer. Spread remaining frosting over top and sides of cake. Store cake loosely covered in the refrigerator.