The best way to remove moisture from potatoes depends on what you’re cooking, but the most effective methods are salting, squeezing in a towel, parboiling, and microwaving. For shredded potatoes (hash browns, latkes), wringing them out in a clean kitchen towel removes the most water in the least time. For fries and roasted potatoes, a combination of rinsing, drying, and brief precooking drives off surface moisture so you get a crisp, golden exterior.
Why Moisture Matters for Crispy Potatoes
Surface moisture is the enemy of crispiness. When wet potatoes hit hot oil or a hot pan, that water has to boil off before the surface temperature can climb high enough for browning to begin. The browning reaction that creates golden color and flavor actually runs fastest at intermediate moisture levels, not when the surface is soaking wet. Every extra drop of water on your potatoes delays that process, leaving you with pale, steamed, soggy results instead of a crisp shell.
Starch plays a role here too. Potatoes release starch when cut, and that starchy surface layer can turn gummy if it traps water underneath. Removing both excess starch and excess moisture gives you the dry, rough surface that crisps best.
Choosing the Right Potato
Your potato variety determines how much moisture you’re working with from the start. Idaho Russet Burbanks contain about 79% water and 21% solids, making them the driest, starchiest common variety. That high starch content is why Russets are the go-to for fries, baked potatoes, and hash browns. Waxy varieties like Yukon Golds and red potatoes have even higher water content and lower starch, which means more moisture to deal with and a creamier (less crispy) result. If your goal is maximum crispiness with minimum effort, start with Russets.
Salting and Resting
Salt pulls water out of potatoes through osmosis. When you toss shredded or sliced potatoes with salt, the salt concentration outside the cells is much higher than the roughly 0.9% salt concentration inside the cells, so water migrates outward. For shredded potatoes, sprinkle about a teaspoon of salt per large potato, toss to coat, and let them sit in a colander or bowl for 10 to 15 minutes. You’ll see beads of water forming on the surface.
After resting, squeeze the potatoes firmly in a clean kitchen towel or several layers of cheesecloth. This two-step process, salting then squeezing, removes far more water than either step alone. Keep in mind that salted potatoes will taste seasoned, so reduce the salt in your recipe accordingly.
The Towel Squeeze Method
For hash browns, latkes, and rösti, physically wringing out shredded potatoes is non-negotiable. Place a few handfuls of shredded potato in the center of a clean, lint-free kitchen towel. Gather the corners, twist the bundle tightly, and squeeze over the sink. You’ll be surprised how much liquid comes out, often a quarter cup or more per potato. Keep squeezing until the dripping slows to occasional drops.
A potato ricer works the same way for cubed or chunked potatoes. Press cooked potato through the ricer and the water drains out with the starch, leaving behind a drier mass that fries or roasts more evenly. Some cooks use a salad spinner for cut fries after rinsing, which won’t extract as much internal moisture but does clear surface water quickly.
Rinsing and Soaking for Starch
Rinsing cut potatoes under cold water removes surface starch, which reduces sticking and gumminess. A quick rinse handles the loose starch on the outside, but if you want to go further, soaking for 30 minutes to two hours in cold water pulls more starch from deeper in the cut surfaces. Multiple rinses are more effective than a single long soak if starch reduction is your primary goal.
The catch is obvious: soaking adds water. After any rinse or soak, you need to dry your potatoes thoroughly. Spread them in a single layer on a sheet pan lined with a clean towel, pat the tops dry with a second towel, and let them air-dry for five to ten minutes. If you skip this step, you’ve traded one problem (starch) for another (moisture).
Parboiling and Steam Drying
Parboiling is one of the most reliable ways to remove internal moisture from potatoes destined for roasting or frying. Cut your potatoes, drop them into salted boiling water, and cook until the edges are just tender but the centers still have some resistance, usually 6 to 10 minutes depending on size. Drain them in a colander and let them steam-dry for at least five minutes. As the residual heat evaporates surface water, you’ll see the steam taper off.
This technique works because boiling gelatinizes the starch on the surface, creating a rough, fluffy exterior. That rough surface crisps beautifully in oil or in a hot oven. Shaking the colander gently after draining roughens the edges even more, which is the secret behind ultra-crispy roast potatoes.
Microwaving Before Frying
If you’re short on time, the microwave can do a version of the same job. Place your cut potatoes in an uncovered microwave-safe bowl and heat on high for 2 to 3 minutes. The microwave drives off surface moisture and partially cooks the starch without requiring a pot of boiling water. After microwaving, pat the pieces dry with a towel, then proceed with frying or roasting. This method works especially well for home fries and skillet potatoes where you want a head start on cooking without waterlogging the pan.
Oven and Air Drying
For large batches, your oven can serve as a drying chamber. Spread cut potatoes in a single layer on a sheet pan and place them in a 200°F oven for 15 to 20 minutes. The low heat evaporates surface moisture without actually cooking the potatoes. This is particularly useful when you’re prepping a big batch of fries and can’t feasibly towel-dry each piece individually.
Air drying at room temperature works too, just more slowly. Spreading rinsed potato slices on a rack with airflow underneath for 20 to 30 minutes removes a meaningful amount of surface water. Placing them uncovered in the refrigerator for an hour or overnight accelerates this, since refrigerator air is very dry.
Matching the Method to the Dish
- Hash browns and latkes: Salt, rest 10 minutes, squeeze in a towel. Repeat the squeeze if needed. The drier the shreds, the crispier the result.
- French fries: Rinse in cold water, soak 30 minutes, dry thoroughly on towels, then either parboil or fry at a lower temperature first. The second fry at high heat finishes the crisping.
- Roast potatoes: Parboil 7 to 10 minutes, drain, steam-dry in the colander, shake to roughen edges, then roast at high heat with preheated oil on the pan.
- Home fries or skillet potatoes: Microwave 2 to 3 minutes, pat dry, then fry in a hot skillet without crowding the pan.
- Mashed potatoes: Use a ricer or food mill after boiling. Both tools let excess water escape. Drying the mashed potato briefly in the pot over low heat removes even more moisture for a fluffier texture.
Combining methods gives the best results. Rinsing removes starch, salting draws out internal water, squeezing or drying eliminates what’s left on the surface, and precooking (parboiling or microwaving) handles moisture deeper inside the cells. The more of these steps you stack, the crispier your final potato will be.