Hint: For extra fluffy mashed potatoes, mash them while they're still hot. Warming the milk or cream slightly before adding can help maintain the temperature and improve absorption.
Variation: If you prefer using an Instant Pot, cook the diced potatoes under high pressure for 8 minutes, followed by a quick release.
Storage: Leftover mashed potatoes can be stored in an airtight container in the refrigerator for up to 3 days. Reheat gently on the stovetop or in the microwave, adding a splash of milk if needed.