Blueberry coffee cake

Blueberry Coffee Cake 

Makes 24 servings. Ingredients:  Topping: 
 * 2 cups flour
 * 1 1/2 teaspoons baking powder
 * 1/4 teaspoon salt
 * 3/4 cup butter
 * 1 cup sugar
 * 3 eggs
 * 1 teaspoon vanilla
 * 1 cup sour cream
 * 1 teaspoon baking soda
 * 1/2 cup sugar
 * 1 teaspoon cinnamon
 * 1 cup walnuts finely chopped
 * 1 1/2 cups blueberries

Directions: sift flour baking power and salt. Prepare topping. Melt 1/4 cup butter. Cool. Beat remaining 1/2 cup butter until soft. Add sugar, eggs and vanilla. Beat until fluffy. Combine sour cream and baking soda. Add dry ingredients alternately with sour cream mixture. Spoon half the batter into greased tube pan. Sprinkle with 1/2 the toping. Add remaining batter. Sprinkle with remaining topping and blueberries. Pat blueberries down. Bake at 350 degrees for 45 minutes.