“Baked On” Icing Cake

2 c. All Bran (cereal) 2 c. oatmeal 2 c. Grape Nuts 3 c. brown sugar 2 tsp. salt 1 c. margarine 2 c. boiling water 5 c. flour 5 tsp. baking soda 4 beaten eggs 1 qt. buttermilk Mix bran, oatmeal, Grape Nuts; add sugar, salt and margarine. Pour boiling water over it, add…