To make 1 cup of liquid milk, mix 1/4 cup dry milk with 1 cup of water. The mixture should be stirred thoroughly and allowed to sit for a few minutes before use.
Instant non-fat dried milk can be mixed more easily than non-instant dried milk. Non-fat dried milk can be stored for a long time, whereas whole-fat dried milk and dried buttermilk can only be stored for a short time. Dried milk is produced by removing the water from the milk using heat. It can be substituted for liquid milk because it retains the vitamins found in liquid milk.