Chocolate Chip Coffee Cake

Directions

1. In a large bowl, cream butter and 1 cup sugar until light and fluffy, 5-7 minutes. Add eggs, sour cream and vanilla; mix well. In another bowl, combine the flour, baking powder and baking soda; add to creamed mixture (batter will be thick).
2. Spread half the batter into a greased 13x9-in. baking pan. Combine chocolate chips, cinnamon and remaining 1/2 cup sugar; sprinkle half over batter. Drop remaining batter by spoonfuls over the top. Sprinkle with remaining chip mixture. Bake at 350° for 25-30 minutes or until a toothpick inserted in the center comes out clean. Cool on a wire rack.