Coca Cola Fudge Icing 1/2 stick butter 2 ounces unsweetened chocolate 1 1/2 cups sugar 1 tsp vanilla 2 tsp light Karo syrup 3-4 tablespoons Coca Cola 1/2 cup milk Mix well and bring to light boil. Boil lightly for 3-4 minutes. Stir frequently. Let cool for 3-4 minutes and then beat for 2-3 minutes. Icing will still be pourable at this point. Pour over your cake. If your cake is cool, it will help it to set up quicker. The fudge icing will harden with time. In my opinion, it’s better the next day