Cream butter and sugar. Mix in eggs, sour cream, and vanilla.

In separate bowl, combine 2 cups flour with baking powder baking soda, and salt. Stir into the creamed mixture.

Combine topping ingredients. Pour half the batter into a tube pan and sprinkle with the blueberries. Add half the topping, then the remaining batter and topping.

Bake at 350 for one hour. Cool for 5 minutes, then remove from pan and finish cooling.