1 box Duncan Hines butter cake mix
3/4 c. oil
1 c. buttermilk
1/3 c. sugar
4 eggs

Mix all ingredients and pour in 3 greased and floured round pans. Bake at 350 degrees until done. Let cool before frosting with Blueberry Topping.

BLUEBERRY TOPPING:

1 lg. container Cool Whip
1 c. sugar
2 (8 oz.) pkg. cream cheese
1 stick butter
2 tsp. vanilla
1 can blueberry pie filling

Beat sugar, cream cheese, and butter. Add vanilla and Cool Whip. Frost each layer and top with 1/2 can blueberry pie filling.