Chocolate Icing - cooking recipe

Ingredients

2 c. sugar
1/4 c. Karo syrup
1/2 c. milk
1/2 c. margarine
1 sq. unsweetened chocolate (1 oz.)
1/2 tsp. salt

Preparation

Mix together thoroughly.
Stir over low heat until shortening and chocolate are melted, stirring constantly.
Bring rapidly to a full rolling boil; boil 1 minute.
Remove from heat and beat until lukewarm.
Add 1 teaspoon vanilla flavoring and continue beating until icing begins to lose its gloss.
(Considerable beating is required.)
If icing does not stiffen after 30 minutes, add 1 teaspoon confectioners sugar.
If too stiff, add 1 teaspoon of milk.