Chocolate Frosting
["4 Tbsp. butter", "4 blocks chocolate", "1/3 c. hot milk", "3 c. sifted confectioners sugar", "1 tsp. vanilla", "1/8 tsp. salt"]
["Melt butter and chocolate in double boiler; stir until blended.", "Stir hot milk into sugar and beat until smooth.", "Stir in vanilla, salt and chocolate mixture.", "Beat until smooth and thickened, about 5 minutes.", "Makes enough frosting for filling and top of 2 (9-inch) cake layers."]
["butter", "chocolate", "hot milk", "confectioners sugar", "vanilla", "salt"]