I got this recipe from my very good friend. I have used it quite a bit and it never disappoints. You can do it as a cake or as cupcakes.
Super-Moist White Cake
3 Egg Whites
1⁄4 cup Flour
1 cup Milk
1 cup Buttermilk
1 package dry, unprepared Instant Pudding Mix (Cheesecake or Vanilla)
1 boxed White Cake Mix
Beat egg whites and flour. Add milk, buttermilk, pudding mix, and cake mix. Mix. Pour batter into greased pans and bake according to package instructions. Top with Cream cheese/ Sour Cream frosting.
Cream Cheese / Sour Cream Frosting
1 (8 ounce) Package of Cream Cheese (softened)
1⁄2 cup Sugar
1⁄2 cup Sour Cream
1 (8 ounce) Cool Whip (thawed)
Mix softened cream cheese, sugar and sour cream. Fold in thawed cool whip. Spread over cooled cake. Refrigerate.