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.
In addition to choosing the right potato (Russet, please!), you'll want to soak the cut potatoes in cold water for about 30 minutes. EXPERT TIP: The chilled exterior of the cut spuds keeps the outside from browing too quickly.
How long do you need to soak potatoes? Soaking potatoes for 15 to 30 minutes is sufficient, but you can soak them for up to an hour, if you have other things to do around your kitchen.
You soak them to remove excess starch. It helps them get crispier and prevents them from sticking together.
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.
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). To keep the potatoes from turning black from oxidation, add 1 teaspoon of lemon juice or white wine vinegar to a gallon of water.
Once the potatoes have soaked, rinse and drain them. Then — also very important — use a towel to pat them down until they are nice and dry before moving onto the next step.
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.
SOAK your potato chunks in cold water.
This removes some of the starch and helps get them super duper crispy.
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. Cubed peeled potatoes can sit in water overnight, but they need to be refrigerated.
(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.)
During cooking, heat makes the starch to swell in a process called gelatinization. This makes the potatoes to more likely to stick together. But proper soaking will prevent this to happen, resulting in potatoes that cook or fry much better— not sticky, but crispier. Just make sure potatoes are soaked in cold water.
Leaching method: Peel and dice potatoes. Place in a large pot of warm tap water and soak for 2 to 4 hours. Drain and set aside.
As soon as you peel the potatoes, you'll want to place them into a bowl of water so they're fully submerged, and then store the bowl of potatoes and water in the refrigerator. The water will seal off the potatoes from the air, so the chemical reaction can't occur.
Once it's time to cook with the potatoes, drain and rinse again with cold water. Washing the potatoes twice with water will remove excess starch, which will help them to get extra crispy when roasted or fried.
Roasted potatoes can become soggy if the water content in the potato isn't fully cooked. Different potatoes have different water content percentages. Also, be mindful of the oil. Potatoes can react like sponges; too much oil can make your potatoes appear to be soggy.
Potatoes will be firmer and crispier if you soak them in salt water before frying or cooking. Although it may seem like an extra step, this process will help you prepare the potatoes in advance.
First let's talk about why cut potatoes need to be immersed in water to begin with. The reason is to prevent the potatoes exposure to air, which causes dehydration, oxidation, and discoloration. Immersing cut potatoes will also help rinse off excess starch.
4. Drain Potatoes. Pour cooked potatoes into a colander or use a slotted spoon to remove large pieces of potato from the hot water and place them in a bowl. If your recipe calls for cooled potatoes, run them under cold water or submerge them in an ice bath to speed the cooling process.
But from anecdotal experience baking oven chips, soaking the potatoes first makes a big difference, and tossing them in corn starch also makes a noticeable difference. Actually, it makes them crisper. Soaking removes excess starch and sugars that inhibit crisping, and reveals better flavor.
The Food and Drug Administration advises you wash potatoes before you eat them. Potatoes grow in the ground, and carry not only dirt but also bacteria to the grocery store and later, your table. Pesticides also remain on potato skin; even organic potatoes carry some degree of contaminants.
Conclusions: Soaking foods in hot water for 5-10 minutes reduces potassium and phosphorus content.
Certain high-potassium foods, such as potatoes, can be soaked in water to reduce their potassium content for people on the kidney diet. For years, renal dietitians have instructed patients on low-potassium diets to cut up and leach or soak potatoes to reduce the potassium load.
Soaking raw potato slices in water for 15-30 minutes before frying or roasting helps reduce acrylamide formation during cooking. (Soaked potatoes should be drained and blotted dry before cooking to prevent splattering or fires.) Storing potatoes in the refrigerator can result in increased acrylamide during cooking.