Chocolate Frosting - cooking recipe

Ingredients

2 c. sugar
2 (1 oz.) sq. unsweetened chocolate
1/2 c. milk
1/2 c. butter or margarine
1/2 tsp. vanilla extract

Preparation

Combine first 4 ingredients in a heavy saucepan.
Cook over low heat until chocolate and butter melt, stirring constantly. Cook over medium heat, stirring constantly, until mixture boils. Boil 1 minute, stirring constantly.
Remove from heat; stir in vanilla.
Beat at high speed of an electric mixer until of spreading consistency.
Immediately spread on cake.
Yield: enough for one 3-layer cake.