Cream shortening, butter, sugar until light and fluffy. Add egg yolks one at a time, beating well after each.
Add buttermilk along with dry ingredients ending with flour.
Stir in remaining ingredients.
Beat egg whites with cream of tartar til stiff. Fold in.
Bake in 3 9” pans or 4 8” pans at 350° for 30-40 minutes until done.