You are here: Home » Recipes » Buttermilk Brownies with Chocolate Frosting Buttermilk Brownies with Chocolate Frosting Recipe by Relish ContributorKitchen Tested Yield 3 1/2 These rich brownies with a yummy icing are a chocoholic's dream. PrintEmail Ingredients Chocolate Buttermilk Frosting:6 tablespoons margarine1/3 cup buttermilk1/4 cup cocoa1 (16-ounce) box confectioners' sugar1/2 teaspoon vanilla extractBrownies:1 cup water1/3 cup canola oil2 cups all-purpose flour2 cups sugar1/4 cup cocoa1/2 cup buttermilk1 teaspoon baking soda1 large egg white, well beaten Chocolate Buttermilk Frosting Instructions To prepare the frosting: Combine margarine, buttermilk, and cocoa in a medium saucepan; bring to a boil. Add confectioners’ sugar and vanilla, blend until smooth. Preheat oven to 400F. To prepare the brownies: Combine water and oil in a small saucepan; bring to a boil. Combine flour, sugar and cocoa in a mixing bowl. Add hot water mixture and stir well. Combine buttermilk and baking soda; stir until soda dissolves. Add buttermilk mixture and egg to batter; mix well. Spoon into a greased 15x10x1-inch jelly-roll pan coated with nonstick cooking spray. Bake for 15 minutes. Frost brownies with Chocolate Buttermilk Frosting while warm. Cool and cut into squares.