2 1/2 c. pared & sliced apples
1/2 c. butter
1 pkg. yellow cake mix
1/2 c. sugar
1 tsp. cinnamon
1 c. sour cream or plain yogurt
2 egg whites

Preheat oven to 350 degrees. Cut butter into dry cake mix until crumbly. Pat mixture lightly into ungreased 13 x 9 x 2 inch pan, building up slight edges. Bake 10 minutes. Arrange apple slices on warm crust.

Mix sugar and cinnamon. Sprinkle on apples. Blend sour cream or plain yogurt with 2 egg whites and a teaspoon of confectioners' sugar and drizzle over apples. Topping will not completely cover apples. Bake 25 minutes or until edges are slightly brown. Do not overbake.