If not using the dry milk, you can replace 1 cup of the water with 1 cup milk, preferably nonfat, scalded (brought to the boiling point) and cooled to lukewarm.

• 成功关键：如果不使用干牛奶，可用1杯水+1杯脱脂牛奶代替。煮沸然后冷却使其变温。