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. Cold water is used because hot water would react with the starch activating it, making it harder to separate from the potatoes.
What happens if you don't Soak potatoes?
It is said that excess starch on the outside of the potato can cause potatoes to stick to one another, because of the gelatinization of the starch. Also, it is said that rinsing of some of those excess sugars will reduce the risk of your fries burning and turning black (because of the Maillard reaction).
How long soak potatoes before cooking?
Give them a cold water bath: Once your potatoes are chopped, toss them into a large bowl. Then cover the potatoes completely with cold water and let them soak for at least 30 minutes (or up to overnight). This will help to rinse off the excess starch and help the potatoes crisp up beautifully in the oven.
Why do chefs Soak potatoes in water?
The soaking, Mr. Nasr said, is the secret to the crisp texture of the fries. It draws out the starch, making them more rigid and less likely to stick together.
Should peeled potatoes be soaked before cooking?
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. This trick is handy, but it'll only work for about 24 hours — so don't prep too far in advance.
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