Chocolate Frosting - cooking recipe

Ingredients

2 sq. unsweetened chocolate, melted or 6 Tbsp. cocoa and 2 Tbsp. oil
1 c. sugar
1/4 tsp. salt
1/2 c. cornstarch
1 c. boiling water
3 Tbsp. butter
1 tsp. vanilla

Preparation

Mix sugar, cornstarch, salt and chocolate.
Gradually add 1 cup boiling water.
Cook and stir over low heat until thickened and smooth.
Blend in butter and vanilla.
Chill over ice water.