The 1-Ingredient Upgrade for the Fluffiest Mashed Potatoes (It Costs Zero Dollars) (2024)

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Getting fluffy, smooth mashed potatoes is easier than you think.

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Molly Adams

The 1-Ingredient Upgrade for the Fluffiest Mashed Potatoes (It Costs Zero Dollars) (1)

Molly Adams

A self-proclaimed food-pusher, Molly Adams has been cooking for the loved ones for as long as she can remember. She is a classically-trained chef with a background in catering, private cheffing and food media. Her experience includes recipe development, recipe testing and food writing.

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Updated November 17, 2023

The 1-Ingredient Upgrade for the Fluffiest Mashed Potatoes (It Costs Zero Dollars) (2)

My ideal mashed potatoes are perfectly seasoned, light, super fluffy, and free of lumps. I take making them pretty seriously because they're one of my favorite foods ever. A ricer must be used, butter should be added with abandon, and if the dairy is anything lighter than heavy cream, I don’t want the mashed potatoes.

I used to attribute the success of making mashed potatoes to the type of potato used, how long they were cooked, and how they were mashed. While all of these things are important, a few years ago I learned a ground-breaking trick from cookbook author J. Kenji López-Alt that trumps all other factors. What if I told you the key to the fluffiest mashed potatoes is one ingredient that also happened to be free?

The 1-Ingredient Upgrade for the Fluffiest Mashed Potatoes (It Costs Zero Dollars) (3)

It’s nothing fancy like cultured butter or crème fraîche—although neither could hurt the cause! The secret ingredient is just ice-cold water.

The 1-Ingredient Upgrade for the Fluffiest Mashed Potatoes (It Costs Zero Dollars) (4)

If you’ve ever made French fries from scratch, you may be familiar with soaking the cut potatoes in cold water to pull out excess starch. This gives you French fries that are crisp and golden, while the insides are light and fluffy.

The same trick applies to mashed potatoes—it's so obvious I wish I would have thought of it myself! You soak the potatoes in iced water before they are cooked. This eliminates much of the starches in the potatoes, resulting in a super light and fluffy mash.

It's also like when you make rice. The key to fluffy rice is to rinse off as much starch as possible. That way the grains don't bloat and aren't drawn together by the excess starch into clumpy, mushy lumps. Also, just like when you rinse rice, you can see the starch leaching out of the potatoes as they soak—you'll see the water turn white.

Here's what I do to rinse the starch off the potatoes:

Fill a large bowl with cold water and a handful of ice. Add the peeled potatoes to the water and let them sit for at least 30 minutes, though one hour is ideal. Then carefully remove the potatoes with your hands or a spider strainer so that the starches pooled in the bottom of the bowl aren't disturbed.

Boil the potatoes until they are tender, proceed with your favorite mashed potato recipe, and you'll notice that they are way fluffier than when you made them without soaking.

I take this one step further: After draining the cooked potatoes into a colander, I rinse them under cold running water to knock off the starches on the surface. Since this will cool the potatoes and add some moisture, I return them to the pot and steam them for a minute or two over low heat. This brings the temperature back up and cooks off any added water.

The 1-Ingredient Upgrade for the Fluffiest Mashed Potatoes (It Costs Zero Dollars) (5)

Mashed Potatoes Rules I Live By

  • Start the potatoes in cold water. Lumpy mashed potatoes are usually a direct result of potatoes that were not cooked evenly. When you start potatoes in warm water, the outsides cook faster than the insides, leading to dreaded lumps. Start them in cold water. The potatoes should be covered with water by at least an inch.
  • Use a ricer! Be very wary of any potato recipe that has you use a blender or food processor. The fastest way to make potatoes gummy is to process them with lots of power. I’m not big on single-use kitchen tools, but a ricer is the only tool that will give you fluffy, smooth mashed potatoes.
  • Don’t shy away from salt. Like pasta, it’s hard to season potatoes after they have been cooked. You want the cooking water to taste like the sea; this will ensure your spuds have some serious flavor. Adding salt after they are cooked will just make the mashed potatoes taste salty, not well-seasoned.
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The 1-Ingredient Upgrade for the Fluffiest Mashed Potatoes (It Costs Zero Dollars) (2024)

FAQs

The 1-Ingredient Upgrade for the Fluffiest Mashed Potatoes (It Costs Zero Dollars)? ›

The secret ingredient is just ice-cold water.

How do you make mashed potatoes fluffy and not gluey? ›

For mashed potatoes that are smooth without being gummy, a potato ricer is your best bet. It gently presses the potato into fine pieces, so all that's left to do is add your liquid and a pat or two of butter.

How do you upgrade mashed potatoes? ›

Garnish With Herbs

Speaking of delicious green things, both woody herbs like sage, rosemary, and thyme, and leafy herbs like dill can add freshness to this starchy side. A herb-based sauce like pesto swirled into mashed potatoes is another way to add vibrant flavor.

What is the trick to thicken mashed potatoes? ›

You can use what you have on hand: Flour, cornstarch, or powdered milk are all solid options that are probably already in your pantry. Potato flour and potato starch would work as well. Stir in the thickening agent gradually, about a tablespoon at a time, until the potatoes have reached your desired consistency.

Why add baking soda to mashed potatoes? ›

Directions. Throw just a pinch of ARM & HAMMER™ Baking Soda into potatoes while mashing to make them fluffier.

Why do restaurant mashed potatoes taste better? ›

Garlic and herbs are added to boost flavor

Instead of boiling a few potatoes and mashing them plain, a lot of restaurant chefs like to apply a little more finesse. Garlic and herbs infused in butter and cream add a flavor boost without overpowering.

What does adding an egg to mashed potatoes do? ›

They just taste rich (almost impossibly so). They do, however, feel creamy, because egg yolks are also emulsifiers (and are, in fact, the ingredient in mayo that makes it an emulsifier). The yolk emulsifies water and fat to create a cohesive, velvety bite, while providing a little fat and body of its own.

Should I soak potatoes in cold water before making mashed potatoes? ›

The secret ingredient is just ice-cold water.

The same trick applies to mashed potatoes—it's so obvious I wish I would have thought of it myself! You soak the potatoes in iced water before they are cooked. This eliminates much of the starches in the potatoes, resulting in a super light and fluffy mash.

What does Rachael Ray use to mash potatoes? ›

Mash potatoes with half-and-half or milk using a potato masher. Add in the cream cheese and smash until the cheese melts into the potatoes. Add chives or scallions. Season with salt and pepper, to your taste.

What do professional chefs use to mash potatoes? ›

The secret weapon, a good potato ricer (affiliate). This pushes the potatoes into strings, which helps them soak up every bit of the cream and achieve maximum fluffliness.

Can you add too much milk to mashed potatoes? ›

Runny potatoes can happen for a few different reasons. Too much liquid: This is the most common reason. In the mashing process you may have added too much milk or broth.

How long do potatoes need to boil for mashed potatoes? ›

Once boiling, reduce heat, adjusting as needed to maintain a simmer. Cook potatoes until they offer no resistance when pierced: 10–12 minutes for baby potatoes, 15–20 minutes for small potatoes, or 30–40 minutes for large cubed potatoes. Drain potatoes in a colander and let cool 10 minutes.

Why can't you add flour to mashed potatoes? ›

Regular flour can also be used to thicken your potatoes as well, but I don't love using it because its raw flavor needs to be cooked out, and it more noticeably dulls the flavor of the potatoes themselves.

How do you keep mashed potatoes from getting gluey? ›

Thick-skinned varieties like russets will give you the fluffiest results. Steer clear of waxy red-skinned potatoes, which turn gluey when mashed. If it's too late to make the swap, change course and roast the potatoes tossed with oil, garlic and some fresh rosemary if you have it, instead of boiling them.

What causes mashed potatoes to be gluey? ›

When too much starch gets released, the potatoes become gummy, gluey, and unappetizing. Overworking the potatoes can happen in a couple ways: either by simply handling them too much, or by using a food processor, blender, or similar tool, which mixes the potatoes too aggressively.

How to make mashed potatoes creamy and not sticky? ›

Throwing in a cold stick of butter and a splash of milk straight from the refrigerator will immediately cool down some of the spuds, which will prevent a creamy, smooth mash. If you take the time to slowly heat milk or heavy cream and butter in a small saucepan on the stove, you'll have much better results.

How do you fix consistency in mashed potatoes? ›

Fix them: Scoop the watery mashed potatoes into a pan and stir constantly over low heat to evaporate the excess liquid. If the potatoes are really watery, you can add either cornstarch or instant mashed potatoes a half teaspoon at a time to help the spuds thicken to your preferred consistency.

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