2 sticks margarine 1 cup water 2 T cocoa. Boil together and remove from heat, mix in 2 cups flour, 2 cups sugar and 1/2 t salt. Mix separately 2 eggs, 1 t baking soda, 1 t vanilla, 1/2 c buttermilk, Combine both mixtures and beat for 2 minutes, our into greased and floured jelly roll pan and bake 20 min at 350. Frosting: bring to a boil and remove from heat 4 T margarine, 1/4 cup cocoa, 1/4 cup buttermilk. Stir in 1 t vanilla and 2 1/2 cups powdered sugar, beat until smooth and pour over warm brownies