Chocolate Chip Coffee Cake Recipe

In a large bowl, cream butter and sugar until light and fluffy. Add eggs, sour cream and vanilla; mix well. Combine the flour, baking powder and soda; add to creamed mixture (batter will be thick). Spread half of the batter into a greased 13-in. x 9-in. baking pan. Combine chocolate chips, cinnamon and remaining 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 near the center comes out clean. Cool on a wire rack. Yield: 12-16 servings.