CAKE:2 cups sugar2 cups all-purpose flour1½ cups small marshmallows½ cup butter or margarine½ cup vegetable oil3 tablespoons cocoa1 cup Coca-Cola½ cup buttermilk1 teaspoon baking soda2 eggs1 teaspoon vanilla extract FROSTING:½ cup butter3 tablespoons cocoa6 tablespoons Coca-Cola1 (16-ounce) box confectioner’s sugar1 teaspoon vanilla extract1 cup chopped pecans Preheat oven to 350 degrees. In a bowl, sift...