Substitute for potato flour Save the water that you boil potatoes in when you are making mashed potatoes Include a few small pieces of potato Add 1/4 cup of powdered milk to the warmed potato water Use potato water and powdered milk instead of milk Potato water can be stored in refrigerator for a couple of days warm in microwave before using I have used potato water in bread and rolls for 50 years. Both of my grandmothers used potato water in yeast bread

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