Chocolate Frosting - cooking recipe

Ingredients

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

Preparation

Mix sugar and cornstarch to chocolate and water.
Boil about 3 minutes until thickened.
Take off heat, stir in butter and vanilla.
Enough to frost 2 layer cake.