Sour-Cream Banana Coffee Cake
["1/2 c. semi-sweet chocolate chips, chopped", "1/2 c. walnuts, chopped", "2 tsp. ground cinnamon", "1 3/4 c. sugar", "1/2 c. unsalted butter, softened", "3 eggs", "2 ripe bananas", "1 (8 oz.) container sour cream", "3 c. all-purpose flour", "2 tsp. baking powder", "1 tsp. baking soda"]
["Preheat oven to 350\u00b0. Lightly coat 12-cup Bundt pan with vegetable cooking spray. In a small bowl, combine chocolate chips, walnuts, 1/2 teaspoon cinnamon and 1/4 cup sugar. Set aside. In a large bowl with an electric mixer at medium-high speed, beat butter and remaining sugar until light and fluffy. Reduce speed to slow; add the rest of the cinnamon and the remaining ingredients. Beat 3 minutes or just until completely smooth. Sprinkle 1/3 of the chocolate-nut sugar on the inside of the pan. Drop in half of the batter in big spoonfuls. Sprinkle with another third of the chocolate-sugar mixture. Pour in other half of the batter. Sprinkle with remaining chocolate-nut sugar. Bake 40 to 45 minutes or until a toothpick inserted into the middle comes out clean. Cool. Turn coffee cake out of pan and cool completely before cutting. Serve crusty side up."]
["semi-sweet chocolate chips", "walnuts", "ground cinnamon", "sugar", "unsalted butter", "eggs", "bananas", "sour cream", "all-purpose", "baking powder", "baking soda"]