1/2 c. butter (softened)
1/2 c. shortening
1 lb. box confectioners' sugar
1/3 c. evaporated milk
1 tsp. vanilla

Cream together butter and shortening. Gradually beat in the sugar then add the evaporated milk gradually. Beat well after each addition. Beat in the vanilla. (You may want to add 1/4 cup of milk if you are using icing for borders or flowers on your cake.)