Chocolate Icing
["2 c. sugar", "2 oz. chocolate", "2 Tbsp. corn syrup", "3/4 c. milk", "2 Tbsp. butter", "1 tsp. vanilla"]
["Stir sugar, chocolate, corn syrup and milk until sugar dissolves then cook slowly without stirring to 238\u00b0 (soft ball). Add butter.", "Remove from heat.", "When lukewarm (240\u00b0, about 25 minutes, add vanilla.", "Beat.", "Ices double layer cake."]
["sugar", "chocolate", "corn syrup", "milk", "butter", "vanilla"]