Fields White recommends soaking the potatoes in cold water first before cleaning them, to break up the dirt. "This is like soaking a dish that has dried food on it—it just loosens things up so you don't have to scrub," she says.
Soak potatoes in cold water to loosen the dirt. A 15- to 30-minute soak should do the trick. Lift the potatoes out of the water, and scrub them with a vegetable brush under cold running water to remove the dirt. If peeling, proceed by removing the potato skins with a vegetable peeler.
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.
When do you wash potatoes before cooking? It's best to wash potatoes just before you use them, says the Idaho Potato Commission. Waiting to clean your potatoes is essential because they can collect bacteria after washing, says Livestrong. Leaving washed potatoes out provides ample opportunities to get them dirty again.
The potatoes travel through a water flume to wash off the field soil. The potatoes are pressure-washed to remove any remaining field soil.
Leaving them unwashed if you're looking for longevity, as unwashed potatoes will last a little longer as the dirt protects them from light. Washed potatoes often lose some of their skin in the washing process, making them more susceptible to air and potential mould spores.
Why use salt water for soaking potatoes? There's moisture naturally found in potatoes, and moisture is drawn to higher concentrations of salt. (This is a process called osmosis.) So, if you put the potatoes in a salt water bath, that will help draw out some of their moisture, resulting in crispier fries.
A: Yes, you will lose nutrients if you soak potatoes in water; the longer they soak, the more you lose. Potatoes are a good source of potassium, vitamin C and some B vitamins, and a portion of these water-soluble nutrients will leach into the water.
Boiling in hot water is just going to push around any dirt particles or sand. As far as scrubbing, just check a couple of the potatoes as a sample and if the eyes are deep they can easily trap excess dirt. If shallow you probably can get away from doing this step.
Soaking potatoes in 5% Acetic Acid Solution (vinegar) removed up to 100% of the pesticides. Diluted vinegar tested as being only marginally better than tap water for removing pesticide residues. Soak 10-20 minutes in SALT WATER.
Don't do it too far in advance. There is no need to wash in a solution of bacterial soap or veggie wash. The magazine, Cooks Illustrated, did find with some fruits and vegetables that an acidic solution of vinegar and water helps disinfect, but scrubbing was pretty effective too. There's also this article from NPR.
Boiling the potatoes in a salt and vinegar bath allows them to soak up all of that briny flavor before you dry them off and crisp them up in the oven. The result is a soft-in-the-center, crispy-on-the-outside potato that's loaded with flavor.
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.
Frying fresh-cut potatoes.
Soaking peeled, washed, and cut fries in cold water overnight removes excess potato starch, which prevents fries from sticking together and helps achieve maximum crispness.
If you're looking for a smart way to save time in the kitchen (and let's face it—who isn't?), try our favorite technique: Peel and cut raw potatoes, then store them in a container with water in the refrigerator to prevent them from turning brown.
According to the Centers for Disease Control and Prevention, at a minimum, potatoes should be rinsed with water before cutting for cooking. Since potatoes are firm, use a clean brush to scrub them. Do not use soap, bleach, disinfectants, or chemicals to clean produce.
How long can peeled and cut potatoes sit in water before cooking, before they begin taking on too much water? A: 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).
Cold Water Soak
Soak them in cold water for as long as a few hours to remove more starch than by rinsing alone. You'll notice cloudiness and starch at the bottom of the bowl. Change the water occasionally, rinsing in between, to eliminate any starch sediment that might settle on the potatoes.
At the beginning of the potato season, when we're using newer potatoes, the naturally-occurring sugar content is very low and we do need to add a small amount of sugar dextrose to our fries to ensure they maintain that golden colour.
The best potatoes for French fries are soaked in a sugar solution before frying. The sugar solution has something to do with the carbohydrates and prevents the potatoes from soaking up a lot of grease, so they get crunchy.
Vinegar causes the potatoes to form a thin crust that further helps in retaining their shape. Vinegar increases the acid pH levels of water which further helps the potato just like when you add a little salt to the water while boiling eggs.
Mishandled potatoes can contain high levels of glycoalkaloids that can cause food poisoning symptoms such as diarrhea, and vomiting within 30 mins.
You should definitely clean potatoes even if you plan to peel them. Why? Dirt and contaminants. Potatoes are on the Environmental Working Group's Dirty Dozen list of produce most contaminated with pesticides, meaning it's advised you buy organic, if possible.
Don't Wash Before Storing
Since potatoes are grown underground, they often have dirt on their skins. While it may be tempting to rinse off the dirt before storing, they will last longer if you keep them dry. This is because washing adds moisture, which promotes the growth of fungus and bacteria.