Blueberry Yum-Yum Cake - cooking recipe

Ingredients

1 yellow cake mix
1/2 c. oil
1 c. buttermilk
4 eggs
1 tub Cool Whip
1 (8 oz.) cream cheese
1 stick butter
1 c. powdered sugar
2 tsp. vanilla

Preparation

Mix, folding Cool Whip in last.
Spread topping over cake making a raised edge around outside.
Pour 1 can blueberry pie filling evenly over top.
Chill and serve.