Blueberry Coffeecake

2 c. blueberries
1 tsp. baking soda
1 c. sugar
2 c. flour
3 eggs, slightly beaten
1 c. sour cream
1 tsp. baking powder
1/4 tsp. salt

Preheat oven to 350 degrees. Cream butter and sugar. Add eggs, baking powder, salt, and baking soda. Stir in flour and sour cream. Add blueberries. Pour into a greased 8x8-inch baking dish.

1 c. brown sugar
1/4 c. butter
1/4 c. flour
Cream brown sugar and butter. Add flour. Mixture will be lumpy. Sprinkle on top of cake and bake for 30 minutes.