Chocolate Streusel Coffee Cake
["1/2 c. butter or margarine, softened", "1 c. sugar", "3 eggs", "1 c. sour cream", "1 tsp. vanilla extract", "2 c. all purpose flour", "1 tsp. baking powder", "1 tsp. baking soda", "1/4 tsp. salt"]
["Prepare chocolate streusel; set aside. Cream butter and sugar in large mixer bowl until light and fluffy. Add eggs; blend well on low speed. Stir in sour cream and vanilla. Combine flour, baking powder, baking soda and salt; add to batter. Blend well. Sprinkle 1 c. chocolate streusel into greased and floured 12 c. bundt pan. Spread one third of the batter (about 1 1/3 c.) in pan; sprinkle with half the remaining streusel (about 1 c.). Repeat layers, ending with batter on top. Bake at 350\u00b0 for 50 to 55 minutes or until cake tester comes out clean. Cool 10 minutes; invert onto serving plate. Cool completely. Makes 12 to 16 servings."]
["butter", "sugar", "eggs", "sour cream", "vanilla extract", "flour", "baking powder", "baking soda", "salt"]