Chocolate Frosting - cooking recipe

Ingredients

1 c. sugar
1 1/2 sq. unsweetened baking chocolate
1 1/2 tsp. vanilla
1 c. boiling water
3 Tbsp. margarine
3 Tbsp. cornstarch

Preparation

Mix sugar and cornstarch; set aside.
Heat water and chocolate until chocolate is melted.
Stir in cornstarch and sugar.
Boil about 3 minutes or until mixture is thickened.
Take off heat, stir in butter and vanilla.
Enough for 2 layer cake.