1/2 c. butter
1 1/2 c. sugar
2 eggs
2 c. sifted flour
1/2 tsp. salt
1 tbsp. vanilla
1/2 c. sour cream
1 tsp. baking soda
4 c. fresh blueberries

Soften butter, add sugar; cream mixture thoroughly. Add eggs; beat well. Combine flour and salt; add alternately with sour cream to which baking soda has been added. Add vanilla. Pour into a buttered and floured 8"x13" baking dish. Arrange blueberries closely on top of batter.

CRUMB TOPPING:

1/2 c. butter
3/4 c. flour
3/4 c. brown sugar