I would suggest to mix the butter with the dry ingredients and add the buttermilk to that without the sugar, then beat the egg whites with the sugar to create a meringue (until the mixture forms peaks) and fold that mixture in with the rest of the cake.
Preparation Time
15 mins
Cooking Time
30 mins
Total Time
45 mins
Calories
400 Calories
Recipe Instructions
Step 1
Preheat oven to 350 degrees F (175 degrees C). Grease and flour 2 9-inch round baking pans.
Step 2
Beat butter and vanilla extract together in a bowl until creamy. Mix flour, baking powder, baking soda, and salt together in a separate bowl. Beat butter mixture, alternating with buttermilk, into flour mixture until fully incorporated.
Step 3
Beat egg whites in a glass or metal bowl until foamy. Gradually add sugar, continuing to beat until medium peaks form. Lift your beater or whisk straight up: the tip of the peak formed by the egg whites should curl over slightly. Fold egg white mixture into batter until just combined. Pour batter evenly into the prepared baking pans.
Step 4
Bake in the preheated oven until a toothpick inserted in the center of each cake comes out clean, 30 to 35 minutes. Cool in the pans for 10 minutes before removing to cool completely on a wire rack.
Step 5
Spread frosting atop one of the cakes and top with second cake. Spread the remaining frosting over the top cake and around the sides of both cakes.