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.
You may think the dish is ruined, but don't fret. Here's a tip on How to Fix Over Boiled Potatoes. Drain the potatoes and place them back into the pot over medium heat and stir them. Stirring removes the excess water and dries them out.
To parboil your potatoes to perfection, cut them into large chunks and put them in a pot of boiling water for around ten minutes, depending on the size. Once the outside is soft but the inside still raw and firm, you're ready to roast!
Visual signs: The potato skin will start to wrinkle when over cooked. The potato, when wrapped in foil or placed on the bottom of a pan will have a dark brown spot on the bottom, a sure sign of over cooking. Foil traps the moisture in the potato causing the skin to be wet and the inside flavorless or gummy.
Potatoes heavy in starch, like Russet and Baking potatoes, will get dry and crumbly if you overcook them but will be fine if you just mash them. Waxy potatoes, like Fingerlings, can be rescued by tossing them gently with oil and roasting them.
Health experts have warned that overcooking foods such as toast, roast potatoes, chips and vegetables can lead to cancer. The Food Standards Agency says that starchy foods cooked at high temperatures for too long form acrylamide - a compound thought to be carcinogenic.
Wonder no more! A potato's cell walls contain pectin, and these pectin chains remain stable when they come into contact with acids. This means that potatoes will remain hard if they are in a dish that has a lot of acid (for example, a dish you've added wine to). Salt is needed to dissolve these pectin chains.
Here's how this sticky state of affairs happens: Cooking causes the starch granules within the potato cells to absorb water and swell. Some cells will inevitably burst, releasing tacky gel that helps give mashed potatoes their cohesiveness.
This process, which is called oxidation, happens because potatoes are a naturally starchy vegetable. And when exposed to oxygen, starches turn gray, brown, or even black. An oxidized potato is completely safe to eat. The process doesn't affect the flavor or texture of the vegetable.
Parboiling is pretty much as easy as it sounds. You simply boil your raw potato with a little kosher salt until they are partially cooked through.
If you want to get ahead, why not boil them in advance, then toss in a little oil and store in the fridge until you're ready to roast them. There's no need to bring them back up to room temperature, just toss them into hot fat straight from the fridge.
Parboiling is different from blanching in that after parboiling, you rinse the food under cold water, to stop it from cooking, then cook it further when other ingredients are ready, or you store it for later use.
Don't overcook your cubed potatoes
According to Eating Well, soggy mashed potatoes are the result of either overcooking your potato cubes, or boiling them instead of gently simmering them: Either way, the potatoes will take on too much water, and, when they're mashed, they'll be too liquidy.
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. So annoying!
Too much — or too vigorous — mashing will produce gluey potatoes. Your best tool is an old-fashioned masher, fork, ricer or food mill. If you've already done the damage, turn pasty potatoes into a casserole: Spread them in a baking dish, drizzle with melted butter and sprinkle with grated cheese and breadcrumbs.
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.
Gray areas on boiled potatoes are OK to eat
That ghostly gray coloring on your boiled potatoes is a harmless chemical reaction that won't affect taste, nutrition, safety or texture.
Boil your cut potatoes in a pot of salted water for about 5 minutes, just until they begin to soften and become slightly translucent. Remove them from the water and let them air dry on paper towels.
MYTH #2. MOST COOKING METHODS DESTROY THE NUTRIENTS IN POTATOES. While boiling potatoes does cause a small loss of water-soluble nutrients like vitamin C and vitamin B6, the white potato retains most, if not all, of its potassium and dietary fiber regardless of cooking method, such as baking, boiling, or frying.
Tip #3: Don't Overcook or Undercook the Potatoes
If you overcook them they disintegrate and your potatoes will be soupy. The specific cooking time depends on the size of your potato: a perfectly cooked piece of potato should give no resistance when cut with a knife, but shouldn't crumble into a million pieces.
Cooking the potatoes just right is key. If they're undercooked, you'll have pockets of crispy potato chunks-—a big no-no for classic fluffy mashed potatoes. If you overcook them they disintegrate and your potatoes will be soupy.
Fire up the oven to reheat roasted potatoes
To get those potatoes crisp again, Consumer Reports recommends reheating in a 400-degree oven, covering your potatoes with tin foil until warm, and then removing the cover for a final few minutes to allow the skin to crisp back up.
Watery potato salads may be caused by the following: Type of potato used. A waxy or moist potato tends to stay that way when cooked. The Russet Burbank variety has high solids (starch to water ratio) and tends to be drier when cooked.