Fantasy Fudge
["6 cups sugar", "1 1/2 cups margarine", "1 1/3 cups evaporated milk", "2 12 oz. pkgs. semi sweet chocolate pieces", "1 13oz. jar marshmallow cream", "2 cups chopped nuts (optional)", "2 tsp. vanilla"]
["Combine sugar, butter and milk in a heavy pan.", "Bring to a full rolling boil stirring constantly.", "Boil 5 minutes over med. heat, or until candy thermometer reaches 234\u00b0."]
["sugar", "margarine", "milk", "pkgs", "marshmallow cream", "nuts", "vanilla"]