For most potato dishes it's important to add the potatoes to cold water and allow the water to come to a boil with the potatoes in the water. The potato starch can react as soon as it comes in contact with hot water, which will promote uneven cooking and mealy potatoes.
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.
They can sit for an hour, or two, like this, Foster says. When you are ready to continue, set the pot over low heat and the simmering water will heat the potatoes back up so you can mash them.
Remove the potatoes from the soaking water, place them in a towel and squeeze out as much moisture as possible. Allow the water to rest for about 30 minutes so the starch settles. Pour the water out of the bowl, leaving the starch at the bottom of the bowl. Combine the starch and potatoes just before cooking.
Bring the water to a boil. Reduce heat to medium low. Cover the pot with a lid and let simmer until fork-tender, about 10-15 minutes for small and/or cubed potatoes or 20-25 minutes for large potatoes.
“Salting the water not only seasons the potato, but it also allows it to boil to a hotter temperature. This in turn cooks the potatoes' starch more thoroughly, resulting in a more creamy texture [for mashed potatoes],” says Sieger Bayer, Chef and Partner at The Heritage.
But the most essential suggestion, per Bon Appétit, is always to salt the water you are boiling your mashed potatoes in. It acts as pre-seasoning, and Bon Appétit recommends adding a full cup of kosher salt to the boiling water.
Ideally, you should wait until your water is at a rolling boil. The boiling water will agitate and dissolve the salt quickly. You can add salt to your cold water if your prefer, though. You don't want to forget it after all!
Adding salt at the beginning of cooking gives it time to migrate into the food, seasoning it throughout. Meanwhile, if you add salt only at the end, it provides a more concentrated, superficial coating that immediately hits your tongue.
Peeled, cubed potatoes cut into small, one-inch pieces should cook in 10 to 12 minutes, once the water reaches a boil. Larger pieces (about 2 inches across) may need longer, around 15 minutes. Medium whole potatoes should boil 20 minutes before they'll be tender.
Add enough cold water to cover the tops of the potatoes. Add ½ to 1 teaspoon salt to the water. Turn the burner on high and bring water to boiling. Reduce the heat to medium-low or low.
Why potatoes can absorb too much water. If your potatoes have been growing in very dry soil, the potatoes themselves will have a fairly low moisture content when harvested. What this then means is that when the potatoes are build they absorb more water and fall to pieces quite quickly.
Do not cover. (Covering changes the environment in the pot and can make the potatoes turn mushy.) Check the potatoes after 5 minutes. Cubed potatoes will cook more quickly than whole potatoes; smaller potatoes will cook more quickly than larger potatoes.
Yes. If you boil potatoes for too long, they'll lose their structure and absorb too much water. That means that they'll become mushy, won't have the correct texture, and won't hold their shape.
So you should think of the potato's peel as its protective jacket. If it's removed before boiling, the flesh will soak up too much of the water in the pot. When you go to mash the potatoes, you'll end up with a watery, gluey mash.
Here's how to do it: For every pound of potatoes in your mash, drizzle 1 tablespoon of melted butter over the dish and fold it gently into the potatoes. If the mash is still too gluey for your liking, repeat the process with another tablespoon of butter.
One of the starch molecules in potatoes is called amylose, which is responsible for making mashed potatoes "gluey" and pasty. Rinsing or soaking cut raw potatoes helps to wash away a very small amount of amylose.
Larger potatoes (like russet) take a little more time — about 20-30 minutes. If you're opting to cut your potatoes into cubes first, you can probably get by with about 15 minutes in boiling water no matter what size potato you started with.
You can prepare the spuds up to 24 hours before you need to cook with them.
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.
Cut The Potatoes Before Boiling
In most households, potatoes are washed in clean water and placed in the cooker with the peel to boil. This method boils potatoes, however it takes a long time to do so. But If you slice the potato in half from the middle and put it in the cooker to boil, it will boil even faster.
Waxy potatoes are best for boiling.
Waxy potatoes include yellow, red, Yukon gold, new, and fingerling potatoes. The texture when boiled is buttery and the flavor is almost sweet.
Boiling your potatoes for a little bit before roasting helps make sure that you get that beautiful crisp crust on the outside. If you don't parboil your spuds, the outside skin will remain quite tough, meaning that whatever fat you use will not be able to get inside the cracks.