3 c. unsifted flour
1 1/2 tsp. baking powder
3/4 tsp. baking soda
1/2 tsp. salt
1/4 c. light brown sugar
1 tbsp. flour
1/2 tsp. ground cinnamon
3/4 c. butter
1 1/2 c. sugar
1 tsp. vanilla
4 eggs
1 c. sour cream
2 c. blueberries, washed
1 c. confectioners sugar
1 - 2 tbsp. milk

Lightly grease and flour 10 inch tube pan. Preheat oven to 350 degrees. Sift 3 cups flour with baking powder, soda and salt; set aside. In small bowl combine brown sugar with 1 tablespoon flour and cinnamon; mix. In large bowl of electric mixer at medium speed beat butter with sugar and vanilla until fluffy. Add eggs one at a time beating after each addition. At low speed beat in flour mixture (3 additions) alternately with sour cream (2 additions). Beat until combined. Pour 1/3 batter into pan, top with half the blueberries and half the brown sugar mixture. Bake 60 minutes; cool in pan 20 minutes. When completely cool drizzle with mixture of confectioners sugar and milk.