1/2 c. butter
1 c. sugar
3 eggs
1/2 tsp. salt
2 c. blueberries
1 tsp. cinnamon
1 c. sour cream
2 c. flour
1 tsp. baking soda
1 tsp. vanilla
1 c. brown sugar

Cream butter and sugar. Beat in 1 egg at a time. Stir in sour cream. Add flour, baking soda, salt and vanilla, beat until smooth. Fold in blueberries. Spread 1/2 of batter in 9"x13"x2" greased pan. In bowl mix brown sugar and cinnamon. Sprinkle 1/2 over mixture in pan. Cover with remaining batter. Sprinkle remaining brown sugar and cinnamon over top. Bake at 350 degrees for 45 minutes.