Salting potatoes correctly makes the difference between bland, watery spuds and flavorful, fluffy ones. The amount of salt you need depends on the cooking method: boiling water should taste like the sea (about 1 to 2 tablespoons of kosher salt per quart), while roasting and mashing need a lighter hand. This guide gives you exact measurements for every technique, so your potatoes turn out perfectly seasoned every time.
Ingredients
- 2 lb (900 g) potatoes (Yukon Gold or russet), peeled if desired
- 1 tbsp (18 g) kosher salt (for boiling water) or 1 tsp (6 g) fine sea salt (for roasting/mashing)
- Water, enough to cover potatoes by 1 inch (2.5 cm)
- 2 tbsp (30 ml) olive oil or melted butter (for roasting or mashing)
- Optional: 2 cloves garlic, 1 sprig rosemary, or 1 bay leaf for flavor
Instructions
- For boiling: Place the potatoes in a large pot and cover with cold water by 1 inch (2.5 cm). Add 1 tablespoon (18 g) kosher salt per quart (liter) of water. Bring to a boil over high heat.
- Reduce heat to medium-low and simmer until a knife pierces the largest potato easily, about 15–20 minutes for medium chunks. Drain well.
- For roasting: Preheat oven to 425°F (220°C). Cut potatoes into 1–2 inch (2.5–5 cm) pieces. Toss with olive oil and 1 teaspoon (6 g) fine sea salt per pound (450 g) of potatoes. Spread in a single layer on a baking sheet.
- Roast for 25–30 minutes, flipping halfway, until golden and crisp. Season with a little extra salt if needed after roasting.
- For mashing: Boil potatoes as in step 1, then drain and return to the pot over low heat for 1 minute to dry. Mash with butter and warm milk, adding salt gradually—start with 1/2 teaspoon (3 g) fine sea salt for 2 lb (900 g) potatoes, taste, and add more if needed.
Tips
- Salt type matters: Kosher salt is less dense than fine table salt. If using table salt, use half the amount. Diamond Crystal kosher is fluffier than Morton, so you may need a bit more.
- Taste as you go: Potatoes absorb salt differently depending on variety and age. Always taste before serving and adjust.
- Don’t oversalt the water for mashing: If you salt the boiling water heavily, the potatoes will absorb a lot. For mashing, use just 1 teaspoon (6 g) salt per quart, then season the mash to taste.
- Common mistake: Adding salt only at the end of roasting. Salt draws out moisture, so season before roasting for crispy edges. But a final sprinkle of flaky salt adds texture and brightness.
Serving Suggestions
Serve salted boiled potatoes with fresh herbs and butter alongside roasted chicken or grilled fish. Roasted potatoes pair well with steak, burgers, or a green salad. Mashed potatoes are classic with gravy, meatloaf, or roasted vegetables.
Variations
- Garlic-herb: Add smashed garlic cloves and rosemary to the boiling water or toss with minced garlic and parsley after roasting.
- Spicy: Toss roasted potatoes with smoked paprika, chili powder, or cayenne before roasting.
- Lemon-parmesan: After roasting, toss with lemon zest, grated Parmesan, and black pepper.
- Vegan mashed: Use olive oil or vegan butter and unsweetened plant milk instead of dairy.
Storage and Reheating
Cooked potatoes can be refrigerated in an airtight container for up to 4 days. Reheat roasted potatoes in a 400°F (200°C) oven for 5–7 minutes to restore crispness. Mashed potatoes can be reheated in a saucepan over low heat with a splash of milk, or in the microwave in 30-second bursts. Boiled potatoes can be pan-fried in a little oil for a crispy exterior. For longer storage, freeze mashed potatoes for up to 3 months—thaw overnight in the fridge before reheating.
Frequently Asked Questions
How much salt should I add to water for boiling potatoes? Use 1 to 2 tablespoons (18–36 g) of kosher salt per quart (liter) of water. The water should taste pleasantly salty, like sea water. This seasons the potatoes from the inside out.
Should I salt potatoes before or after cooking? For boiling, salt the water before cooking so the potatoes absorb seasoning. For roasting, salt before roasting for crispy, seasoned edges. For mashing, it’s best to salt lightly during cooking and then adjust after mashing to avoid over-salting.
What’s the best salt for potatoes? Kosher salt is ideal because its large flakes are easy to control and distribute evenly. Fine sea salt or table salt works too, but use about half the amount. Flaky sea salt is great as a finishing touch.
How do I fix oversalted potatoes? If your potatoes are too salty, add more unsalted cooked potatoes, a splash of milk or cream (for mash), or a squeeze of lemon juice to balance the saltiness. For boiled potatoes, you can rinse them in hot water briefly, but this will wash away some flavor.
Do different potato varieties need different salt amounts? Yes. Waxy potatoes (like red or new potatoes) absorb less salt than starchy ones (like russets). Start with less salt for waxy potatoes and adjust to taste.
Can I salt potatoes ahead of time? Yes, for roasting, you can salt and oil the potatoes up to a day ahead and keep them in the fridge. For boiling, salt the water just before cooking, not ahead, as the potatoes may absorb too much and become mushy.
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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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