2 cups flour
2 cups sugar
1 teaspoon baking soda
1/4 teaspoon salt
1 cup butter or margarine
1/3 cup unsweetened cocoa powder
2 eggs
1/2 cup buttermilk or sour milk
1 1/2 teaspoons vanilla
…..
Grease a 15x10x1 inch or a 13x9x2 inch baking pan; set aside. Combine flour, sugar, baking soda, and salt; set aside.
In a medium saucepan combine butter, cocoa powder and 1 cup water. Bring mixture to just boiling, stirring constantly. Remove from heat. Add the chocolate mixture to dry mixture and beat with an electric mixer on medium to high speed until thoroughly combined. Add eggs, buttermilk, and vanilla. Beat for 1 minute (batter will be thin). Pour batter into the prepared pan.
Bake in a 350 degree oven for about 25 minutes for the 15×10 inch pan or 35 minutes for the 13×9 inch pan or till a wooden toothpick comes out clean.
Pour warm Chocolate-Buttermilk frosting over the warm cake, spreading evenly. Place cake in pan on a wire rack; cool thoroughly before cutting. Makes 24 servings.
Chocolate-Buttermilk Frosting: In a medium saucepan combine 1/4 cup butter or margarine, 3 tablespoons unsweetened cocoa powder, and 3 tablespoons buttermilk. Bring to boiling. Remove from heat. Add 2 1/4 cups sifted powdered sugar and 1/2 teaspoon vanilla. Beat till smooth. If desired, stir in 3/4 cup coarsely chopped pecans.