Peel potatoes. immediately add them to a pot with cold water to deter browning.
4 pounds potatoes, water to cover
Cut them into pieces so that they will cook faster.
Add salt. Bring them to a boil in a large, covered pot, over high heat. Reduce heat to a low boil until the potatoes are tender.
1 teaspoon salt
Drain. Reserve a cup of the cooking liquid.
Mash with a potato masher or a hand mixer with a bit of the cooking water.
Make the consistency thicker than you normally would when you are mashing.
To Rehydrate the Potatoes
To rehydrate for two servings, boil ⅔ cup of water or milk with one tablespoon of butter. Remove from the heat and stir in ⅔ cup of dehydrated potatoes. Mix with more butter, milk, salt, or sour cream. Garnish with chives.
⅔ cup milk or water, 1 tablespoon sour cream, salt to taste
Notes
It makes about 3 cups of instant mashed potatoes or nine servings.