2 cups sugar 2 cups flour 1/4 teaspoon salt 1/2 cup buttermilk 1 teaspoon baking soda 3 tablespoons cocoa 1 tablespoon vanilla 2 eggs 1 stick Margarine 1/2 cup shortening 1 cup Coca Cola 2 cups miniature marshmallows ***ICING*** 1 stick margarine 3 tablespoons cocoa 6 tablespoons coke 1 teaspoon vanilla 1 box powdered sugar 1 cup Chopped nuts (optional) CAKE: Mix first 7 ingredients, then heat next 4 and add gradually into first mixtures. Grease 13X9X2 inch cake pan and cover bottom with 2 cups miniature marshmallows. Pour batter over that. Bake at 350 degrees (preheated oven) for 35-45 minutes. Pour icing over warm cake. ICING FOR COKE COLA CAKE: Heat margarine, cocoa, coke and vanilla. pour over the powdered sugar and mix. Add nuts. Add frosting on the cake. Cool before serving.