1 c. oil
2 c. sugar
4 eggs
1 tsp. vanilla
3 c. flour
1 (21 oz.) can blueberry pie filling

Mix first 5 ingredients in order given. Pour 2/3 of batter on large greased cookie sheet. Spread pie filling on top. Drop remaining batter on top of pie filling. Bake at 325 degrees for 40 to 45 minutes. when cool, cut into squares. Serve with Cool Whip.