Never-Fail Chocolate Icing
["2 c. sugar", "3 Tbsp. chocolate (cocoa)", "1/2 c. Pet milk", "1 stick margarine"]
["Mix all", "together", "and", "after it starts boiling, boil 2 minutes and", "add", "1 teaspoon vanilla.", "Beat until you think it will stay on the cake."]
["sugar", "chocolate", "Pet milk", "margarine"]