Chocolate Butter Frosting
["1/2 c. butter or margarine", "1 lb. (about 4 c.) powdered sugar", "3 to 4 sq. unsweetened chocolate, melted", "4 Tbsp. milk (about)", "1/8 tsp. salt", "1 tsp. vanilla"]
["Cream the butter. Add salt and part of the sugar gradually, blending well.", "Add melted chocolate and vanilla. Add rest of sugar alternately with milk until frosting is smooth and thick enough to spread."]
["butter", "powdered sugar", "unsweetened chocolate", "milk", "salt", "vanilla"]