Ingredients
3/4 cup shortening
1 lb. powdered sugar
1/2 cup plus 1-1/2 tsp. milk
1/8 tsp. salt
1-1/2 tsp. vanilla, lemon or rum flavoring
1 tsp. glycerin

Combine and beat until smooth and creamy. May take 10 minutes of beating with a mixer. If too thick add a teaspoon of milk at a time until the consistency is right to spread.