1/2 c. butter
1 c. sugar
3 eggs
1 c. sour cream
2 c. flour, sifted
1 tsp. baking soda
1/2 c. chopped nuts
1/2 tsp. salt
1 tsp. vanilla
2 c. fresh blueberries, lightly floured
1/2 c. brown sugar
1/2 tsp. cinnamon

In large bowl of electric mixer, cream butter until light and fluffy. Beat in sugar until well mixed. Add eggs one at a time, beating well after each addition. Stir in sour cream. Add flour, baking soda, salt and vanilla. Beat until smooth and well blended. Fold in blueberries. Spread half of the batter evenly in greased 9 x 13 inch pan. In small bowl, combine brown sugar, nuts and cinnamon, mix thoroughly and sprinkle evenly over batter in pan. Spread remaining half of the batter on top. Bake at 350 degrees for 40 to 45 minutes. Cool on wire rack before cutting.