3 c. flour
1 tsp. baking powder
1 tsp. baking soda
1 c. sugar
1 c. butter
1 c. sour cream
1 c. milk
1 tsp. vanilla
2 eggs
1 (12 oz.) can blueberry filling

TOPPING:

1/4 c. flour
1/4 c. sugar
3 tbsp. butter

Mix first 4 ingredients and cut in butter. Add sour cream, milk, and eggs. Beat well. Spread half of batter in greased and floured 9x13 inch pan. Spoon filling and spread carefully, then top with remaining batter. Combine topping ingredients and sprinkle over batter. Bake at 350 degrees for 40 to 45 minutes.