LUSCIOUS LEMONADE LAYER CAKE

Steps:

• Preheat oven to 350°F.
• 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.
• Combine flour, baking powder, salt and baking soda; stir will with a whisk.
• Add flour mixture and buttermilk alternately to sugar mixture, beginning and ending with four mixture; beat well after each addition.
• Cut a circle of parchment paper for bottom of 2 (9-inch) round cake pans and spray sides with cooking spray.
• Divide batter between pans.
• Sharply tap pans once on counter to remove air bubbles.
• Bake at 350°F 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 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 over beat).
• 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.