Soaking potato wedges, slices, or whole potatoes in salt water before baking is a simple technique that draws out excess starch and seasons the potato from the inside out. The result is a baked potato with a fluffy interior and a crisp, well-seasoned skin or edge, without the need for heavy oil or salt at the table. This method works especially well for roasted wedges, hasselback potatoes, and whole baked potatoes, giving you restaurant-quality texture at home.
Ingredients
- 4 medium russet potatoes (about 2 lb / 900 g total)
- 2 tablespoons (30 g) kosher salt, plus more for finishing
- 4 cups (960 ml) cold water
- 1 tablespoon (15 ml) olive oil or melted butter (optional, for crispier skin)
- Freshly ground black pepper, to taste
Instructions
- Scrub the potatoes thoroughly under running water to remove any dirt. If baking whole, pat them dry. If making wedges or slices, cut them into uniform pieces (about 1-inch / 2.5 cm thick) so they cook evenly.
- In a large bowl or pot, dissolve the 2 tablespoons (30 g) kosher salt in the 4 cups (960 ml) cold water. Stir until the salt is fully dissolved.
- Submerge the potatoes in the salt water. If they float, place a small plate or lid on top to keep them submerged. Let them soak for 15 minutes (or up to 2 hours for a stronger salt flavor).
- Drain the potatoes and rinse them briefly under cold water. Pat them very dry with a clean kitchen towel or paper towels—this is crucial for crispness.
- Preheat your oven to 425°F (220°C). If using oil or butter, toss the potatoes with it now, along with a pinch of black pepper.
- Arrange the potatoes in a single layer on a baking sheet. For whole potatoes, prick each with a fork a few times to allow steam to escape.
- Bake for 45–55 minutes, flipping wedges or slices halfway through, until the potatoes are golden brown and easily pierced with a fork. For whole potatoes, they are done when the internal temperature reaches 205–210°F (96–99°C) for a fluffy texture.
- Remove from the oven and sprinkle with a little flaky salt if desired. Serve hot.
Tips
- Don’t oversoak: Soaking for more than 2 hours can make the potatoes waterlogged, leading to a mushy texture. Stick to 15 minutes for a quick soak or up to 2 hours for more flavor.
- Dry thoroughly: Any moisture left on the surface will steam the potatoes instead of roasting, preventing crispness. Use a clean towel and pat each piece individually.
- Use kosher salt: Table salt is finer and saltier by volume; if you only have table salt, reduce the amount to 1½ tablespoons (22 g) to avoid over-salting.
- Cut evenly: For wedges, try to keep them all the same thickness so they cook at the same rate. Thicker pieces will need more time.
Serving Suggestions
Serve these salt-soaked baked potatoes as a side to grilled steak, roasted chicken, or pan-seared fish. For a vegetarian main, top with chili, sautéed mushrooms, or a dollop of sour cream and chives. They also make excellent game-day fare with a side of garlic aioli or ketchup.
Variations
- Herb and garlic: Add 2 smashed garlic cloves and a few sprigs of rosemary to the soaking water for a subtle herbal note.
- Spicy: After baking, toss the potatoes with a pinch of cayenne pepper or smoked paprika.
- Parmesan crust: In the last 10 minutes of baking, sprinkle grated Parmesan over wedges and return to the oven until melted and golden.
- Sweet potatoes: Use the same method with sweet potatoes, but reduce the salt to 1½ tablespoons (22 g) and bake for 35–40 minutes, as they cook faster.
Storage and Reheating
Leftover baked potatoes can be stored in an airtight container in the refrigerator for up to 4 days. To reheat, place them on a baking sheet in a 400°F (200°C) oven for 10–15 minutes, or until heated through and crisp. You can also reheat in an air fryer at 375°F (190°C) for 5–7 minutes. Avoid microwaving, as it makes the skin soggy.
Frequently Asked Questions
Why soak potatoes in salt water instead of just salting them before baking?
Soaking in salt water seasons the potato more deeply than surface salt alone. The salt penetrates the flesh during the soak, so the flavor is distributed throughout, not just on the outside. It also helps draw out some starch, which contributes to a crispier exterior.
Can I use iodized table salt?
Yes, but you’ll need less because table salt is denser and saltier than kosher salt. Use about 1½ tablespoons (22 g) for the same 4 cups (960 ml) of water. If you prefer a less salty result, start with 1 tablespoon (15 g) and adjust to taste.
Do I need to soak whole potatoes?
For whole baked potatoes, soaking is optional but can help season the skin and slightly improve fluffiness. If you do soak whole potatoes, prick them with a fork before soaking to allow the salt water to penetrate a bit. However, the effect is more noticeable with cut potatoes like wedges or slices.
Can I soak potatoes overnight?
Overnight soaking is not recommended, as the potatoes can become waterlogged and lose flavor. If you need to prep ahead, soak for up to 2 hours, then drain, dry, and refrigerate in a sealed container for up to 24 hours before baking.
What if I don’t have kosher salt?
Use sea salt or pickling salt as a substitute. Avoid using coarse rock salt, as it dissolves too slowly. If using fine sea salt, use the same amount as table salt (1½ tablespoons / 22 g).
Can I reuse the salt water?
No, discard the salt water after soaking. It contains starches and dirt from the potatoes and should not be reused for other batches.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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