3/4 c. butter
1 1/2 c. sugar
3 eggs
1 1/2 tsp. vanilla
3 c. flour
1 1/2 tsp. baking powder
1 1/2 tsp. baking soda
1/4 tsp. salt
1 1/2 c. sour cream
1 1/2 c. blueberries

Heat oven to 350 degrees and grease and flour tube pan. Mix butter, sugar, eggs and vanilla. Beat on medium 2 minutes. Mix flour, baking powder, baking soda, salt alternately with sour cream to butter mixture. Spread 1/3 of batter in pan. Sprinkle with 1/3 of blueberries and 1/3 of the following mixture: 1/3 cup brown sugar and 1 1/2 teaspoon cinnamon. Repeat 2 times and bake for 1 hour.