Blueberry Cake - cooking recipe

Ingredients

1 box yellow Duncan Hines cake mix (without butter)
1 (12 oz.) Cool Whip
2 (8 oz.) sour cream
1 c. sugar
1 can blueberry pie filling

Preparation

Mix cake and cook like
box
says making 2 layers.
Cool and cut each layer in half making 4 layers.
Mix sour cream and sugar; spread on each layer cut side up so that it will soak up juice. Put blueberries on top of sour cream mixture and spread on each layer.
Put Cool Whip over the whole cake.