To prepare a chocolate chip sour cream coffee cake recipe, first you need to prepare the ingredients. First, you'll need the following ingredients: 1 1/2 cups granulated sugar 1 cup melted butter 1 tablespoon vanilla extract 1 teaspoon salt 2 tablespoons cocoa powder 2 teaspoons baking powder 1/8 teaspoon baking soda 14 cup buttermilk Instructions Preheat the oven to 350 degrees Fahrenheit (180 degrees Celsius). Grease and flour two 8-inch round cake pans and set aside. Sift together the dry ingredients, except for the chocolate chips. Add the wet ingredients and mix until just combined. Pour the batter into the greased pan. Bake the cake for 35 to 40 minutes, or until the toothpick inserted in the center comes out clean. Allow the cakes to cool for 10 minutes before removing them from the pan and serving.