Prepping the potatoes ahead of time To save time on peeling and chopping on Thanksgiving Day (or any other day that includes mashed potatoes), you can peel the spuds and keep them submerged in a bowl of water in the fridge, whole or cut up, for hours — even overnight — before boiling.
If you'll be cooking the potatoes in the next few hours, you can leave them submerged in water at room temperature, Tiess says. If it will be longer than a few hours, place them in the refrigerator. Peeled, sliced, submerged, and refrigerated potatoes should be cooked within 24 hours.
They just won't stand up to an overnight soak, so don't do it. The larger the potato pieces, the longer they'll last in water. If you're prepping with smaller pieces, don't soak for more than 12 hours.
No matter which way you slice (er, peel?) it. The short answer is yes. You can absolutely peel potatoes ahead of time.
The whole process is simple: peel them, leave them whole or dice them if you want, fill a bowl with cold water, submerge the potatoes and store in the fridge overnight. While this trick can be quite handy, it will only work for about 24 hours, so we would recommend to not prep your potatoes too far in advance.
We usually recommend no more than 24 hours. You can keep the potatoes from absorbing the water by making sure the water is not salted, and is chilled (you can even add ice to the water).
You can store peeled potatoes in water in the refrigerator for about 24 hours. Peeled potatoes left out by themselves at room temperature, on a refrigerator shelf or wrapped in foil or plastic wrap will still get dark overnight, so submerge them in a bowl of water, cover and refrigerate.
The result is very fluffy mashed potatoes. (If you decide to try soaking the raw potatoes anyway, they can be soaked in water in the refrigerator for several hours without any safety concerns. Potatoes can be soaked even overnight as long as they are in the refrigerator.)
You should store peeled and cut potatoes in water for 24 hours to ensure the quality of your final product. "If you drain the potatoes and notice they are turning brown, that they've started getting soft, or if they are slimy you should discard them," says Brigman.
The best (and most popular) way to keep cut potatoes from turning brown is to completely submerge them in a bowl of water. Store the water-covered potatoes in a bowl in the refrigerator until you're ready to use them, up to one day in advance.
Soak the potatoes in water for at least 4 hours, up to overnight. This step is crucial to really get all of the excess starch off. Fill a large pot with water, rinse off the potatoes one last time and add them to the cold water. Salt the water, place the pot on the stove and turn on the heat.
Some people prefer to boil their potatoes whole, while others prefer to cut the vegetables into pieces before boiling. Smaller potatoes (like red gold) will cook faster whole — about 15-20 minutes in boiling water. Larger potatoes (like russet) take a little more time — about 20-30 minutes.
Soaking potatoes in water helps remove excess starch. Excess starch can inhibit the potatoes from cooking evenly as well as creating a gummy or sticky texture on the outside of your potatoes.
Raw potatoes that have been cut should be stored in a bowl of cold water and refrigerated. They'll be good for the next 24 hours. And finally, cooked potatoes will last three to four days in the fridge, as is the case with most leftovers.
It Gives a Firmer Texture
Since soaking potatoes in salt water draws out excess moisture and reduces their ability to absorb oil, it helps them have a firmer texture. Surely, you would want your French fries and baked potatoes to be firm.
Editor's Tip: Sliced, shredded, cubed or really any kind of peeled potato can be stored in cold water for about 24 hours before any noticeable change happens to the potato's structure or texture. Ready to start cooking?
Water literally washes off starch, but it can also wash off enzymes that break down pectin (the natural glue that holds cells together). Soaking the potatoes for too long, or cutting them too small before boiling will remove all the enzymes, leaving too much glue that can't be broken down.
Rinsing potatoes helps remove excess starch, so it is recommended to rinse the potatoes before cooking. To ensure even more starch is out of the way, it's recommended that they even be quickly rinsed after boiling. We recommend using hot water for rinsing after boiling and cold water prior to boiling.
Here are some potato water uses in cooking, baking, and preparing meals without gluten or dairy. Use it as a base for gravy (you won't need to add as many thickeners!) Save the water and use it in making mashed potatoes. It will lessen the amount of cream needed to make them lighter.
Once cooked (whole or cut) potatoes can be stored in water (with or without vinegar) without becoming discolored or mushy. But, water storage isn't necessary. Refrigerate the boiled potatoes in a sealed container and use within a couple of days.
How to Peel and Slice Potatoes Ahead of Time to Reduce Holiday Stress. With some smart strategies and advance planning, you can clean, peel and chop potatoes the night before or morning of your dinner party, so your spuds will be ready to go when you need them for mashing, baking, Hanukkah latkes and more.
Just be sure to store peeled potatoes in water for no more than 24 hours.
Tips for the Best Mashed Potatoes
Start cooking the potatoes in cold water: This ensures that the potatoes cook evenly. Otherwise, if you start with hot or boiling water, the outsides of the potatoes cook and soften while the middles are still hard and crunchy.
Mashed potatoes can be kept warm in a crockpot (if serving later the same day) OR refrigerated for up to 2 days. To reheat, place them in a large pot over medium-low heat, stirring constantly and adding additional milk/cream as needed to achieve the desired consistency.