Step one: cook your spuds fully. Mash, roast, or boil them until tender. Let them cool completely. You do not want freezer burn from hot steam.
Step two: portion them out. Use zip-top bags, but squeeze out all the air. Air is the enemy of frozen food. Oxygen creates ice crystals and weird flavors.
Step three: label them with a date. Frozen cooked potatoes last three to six months. After that, they get a bit dull. Not dangerous, just boring.
Pro tip: make extra mashed potatoes on purpose. They thaw perfectly in a microwave or a hot water bath. Stir in a little warm milk and butter to revive them.
Freeze Damagev2 – Potato News Today
Fun Potato Trivia
Did you know the French fry was likely invented in Belgium? They have a whole museum about it. They also know that freezing fries is a sacred art.
The largest potato ever recorded weighed over 11 pounds. Imagine freezing that monster. You’d need a separate freezer just for the mashed potato aftermath.
There is a potato variety called the ‘Russet Burbank’. It’s the king of frozen fries. Its low moisture content makes it less weepy. You can buy seed potatoes named after it.