¾ c cocoa
¾ c boiling water
¼ c softened butter
¼ c shortening
2 c sugar
1 t vanilla
½ t salt
2 eggs
1-1/2 t baking soda
1 c buttermilk or sour milk (1 T vinegar plus milk to equal 1 c)
1-3/4 c flour
Stir together cocoa and boiling water until smooth; set aside. Cream butter, shortening, sugar, vanilla, and salt in large bowl until light and fluffy. Beat in eggs. Stir baking soda into buttermilk; add alternately with flour to creamed mixture. Blend in cocoa mixture.
Pour into 2 greased and wax paper–lined 9-inch pans or a 13x9 pan. Bake at 350 for 30-35 minutes (40-45 for 13x9); cool 10 minutes; remove from pans. Frost as desired.