To prepare a chocolate sour cream frosting chocolate recipe, first you need to make the chocolate. First, you'll need chocolate chips. You can use any kind of chocolate, but I prefer to use semi-sweet chocolate because it's easier to work with. Then you will need the following ingredients: 1 cup (240 ml) granulated sugar 1 tablespoon (25 g) cocoa powder 2 tablespoons (60 milliliters) water 1 teaspoon (0.5 tsp) vanilla extract Instructions: Preheat the oven to 375 ?F (191 oC) and grease two 9-inch (23 cm) round cake pans with butter or margarine. Melt the butter in the microwave for 30 seconds. Add the confectioners' sugar and beat with an electric mixer until the sugar is completely dissolved. Pour the melted chocolate into the greased pan and stir to coat the bottom and sides of the pan. Bake the cake for 20 to 25 minutes or until it is set and the top is golden brown. Let cool before frosting.