Instructions

1. Preheat oven to 375 degrees F (190 degrees C). Grease one 8x8 inch pan.
2. Cream together 3/4 cup sugar, butter, and egg.
3. In a separate bowl mix together 1 1/2 cups flour, baking powder, and salt. Stir into sugar mixture, alternating with milk and sour cream. Stir in blueberries. Pour into greased 8x8 inch pan.
4. To make topping: Combine white and brown sugars, 2/3 cup flour, cinnamon, and butter. Sprinkle over cake batter.
5. Bake at 375 degree F (190 degrees C) for 25-30 minutes.
6. The batter is REALLY thick so don't be surprised when you can't pour it into the pan. You will have to scoop it in and spread it around.