Brownstone Front Cake (South Carolina) 1 cup buttermilk 1 teaspoon baking soda 1 cup (2 sticks) margarine 2 cups granulated sugar 3 egg yolks 2 squares unsweetened chocolate, melted 3 cups cake flour 1/2 teaspoon salt 1 teaspoon vanilla extract 3 egg whites, stiffly beaten Mix buttermilk and baking soda together; let stand to expand. Cream margarine and sugar. Add yolks and chocolate; mix. Add buttermilk mixture, then sifted ingredients. Add vanilla extract and beat well. Fold in egg whites. Bake in greased, lined tube pan at 300 degrees F for 1 hour. This cake is delicious unfrosted or, for a special touch, frost with Icing for Brownstone Front Cake. Icing for Brownstone Front Cake 1 cup (2 sticks) butter or margarine 2 cups granulated sugar 1 (5 1/3 ounce) can evaporated milk 1 1/2 teaspoons vanilla extract In saucepan, combine margarine, sugar and milk. Dissolve over low heat. Bring to boiling point and simmer 45 minutes uncovered. Remove from heat; add vanilla extract. Cool to room temperature, then beat well. Spread on cake.