Sour Cream Streusel Coffee Cake

Directions

1. In a large bowl, cream butter and sugar until light and fluffy, 5-7 minutes. Beat in the eggs, sour cream and vanilla. Combine the flour, baking powder, baking soda and salt; add to creamed mixture and beat until combined. Spread half the batter into a greased 13x9-in. baking pan or dish.
2. In a small bowl, combine topping ingredients; sprinkle half the topping over batter. Dollop with remaining batter and sprinkle with topping. Bake at 325° for 40 minutes or until a knife inserted in the center comes out clean. Cool on a wire rack.