French Cream Chocolate Frosting - cooking recipe

Ingredients

1/2 c. butter or margarine
2 1/2 c. sifted confectioners sugar
1 egg
3 sq. melted unsweetened chocolate, cooled
1 tsp. vanilla

Preparation

Cream butter or margarine.
Gradually add confectioners sugar, creaming well.
Add egg; mix thoroughly.
Blend in melted chocolate and vanilla.
Beat until of spreading consistency.
Thin with milk, if necessary.