Buttercream Icing

1/2 C  (one stick) margarine
1/2 C shortening
4 C powdered sugar (1 lb)
1/4 C evaporated milk
1/2 tsp salt
1 TB vanilla

Cream together margarine and shortening on medium speed.
Add one C sugar and one TB milk alternately until sugar is gone.
Add salt and vanilla  and mix on medium for 5 minutes.  Makes
about 4 cups.

Chocolate Buttercream:  Add 1/2 to 3/4 C cocoa powder and 2 TB milk.

Cream Cheese Icing:  Add 4 oz. cream cheese and decrease Crisco to 1/4 Cup.