1/2 c. butter
2 c. sugar
2 eggs
2 1/2 c. flour
2 tsp. baking powder
1 tsp. salt
1/2 c. milk
1 tsp. vanilla
3 c. blueberries

Put all ingredients except berries in a bowl and beat for thee minutes on high. In a separate bowl, dust berries with flour and fold into cake batter gently. Grease and flour a 9"x13" pan. Pour into prepared pan and sprinkle with a mixture of cinnamon and sugar. Bake at 350 degrees for about 45 minutes.