Grandma'S Chocolate Icing
["1 1/2 sticks margarine", "4 c. sugar", "1/2 c. cocoa or less to color sugar", "1 big cooking spoon Karo syrup", "1/2 c. milk", "2 tsp. white vinegar", "2 tsp. vanilla"]
["Melt", "the", "margarine", "in a medium size boiler.", "Mix the sugar, cocoa,", "Karo", "syrup,", "milk and vinegar together.", "Pour this mixture into the melted margarine; bring to rolling boil for 1 minute, stirring constantly.", "Place boiler in cold water in", "sink, stirring until icing loses its shine.", "Add vanilla. Stir.", "Spread while warm on cold cake."]
["margarine", "sugar", "cocoa", "syrup", "milk", "white vinegar", "vanilla"]