配方: 1 tablespoon sugar 1勺糖 ½ cup milk, cream, or half and half 1/2杯牛奶,‘ ¼ teaspoon vanilla extract (or other flavoring) 1/4茶匙香草 6 tablespoons salt 6大勺盐 Enough ice to fill the gallon-sized bag halfway 装大半袋子的冰 1 gallon-sized Ziploc bag 1 pint-sized Ziploc bag