Crispy Roasted Potatoes
Most roasted potatoes come out of the oven soft and pale, missing the shattering crust that makes them worth eating. The fix isn’t more oil or a hotter oven, it’s roughing up the potato’s surface before it hits the pan. This method starts with a quick parboil in baking-soda water, which speeds up the breakdown of the potato’s exterior into a starchy paste that fries into a hard, craggy shell once roasted. The inside stays soft, close to how a good baked potato eats. The whole process takes under an hour, most of it hands-off, and it works with almost any potato you have in the pantry.
Quick Facts
Prep time: 15 minutes Cook time: 40 minutes Total time: 55 minutes Yield: 4 servings Calories: about 270 kcal per serving (estimated, see nutrition note below)
Why This Recipe Works
Baking soda raises the pH of the parboiling water, which breaks down pectin on the potato’s surface faster than plain water. That breakdown releases starch, and starch is what turns into a crisp, craggy crust once it hits hot oil in the oven.
Roughing up the parboiled potatoes in a colander scuffs the surface and increases the area exposed to oil and heat. More rough surface touching a hot pan means more crunch once the potatoes roast.
Preheating the baking sheet before the potatoes go on means they start crisping the moment they touch metal, instead of steaming in their own moisture for the first several minutes.
Roasting at 450°F (232°C) browns the outside fast enough that the inside finishes cooking through without turning to mush.
Ingredients
- 2 pounds (about 900g) Yukon Gold or russet potatoes, scrubbed and cut into 1.5-inch chunks (skin on)
- 1 teaspoon baking soda
- 1 tablespoon kosher salt, divided
- 3 tablespoons olive oil
- 1/2 teaspoon black pepper
- 1/2 teaspoon garlic powder
- 2 tablespoons chopped fresh rosemary or thyme, optional
Equipment
A large pot for parboiling, a colander for draining and roughing up the potatoes, and one heavy rimmed baking sheet large enough to hold the potatoes in a single layer without crowding. A crowded pan is the most common reason roasted potatoes turn soft instead of crisp.
Step-by-Step Instructions
Step 1: Parboil the Potatoes
Put a rimmed baking sheet in the oven and preheat to 450°F (232°C). Bring a large pot of water to a boil, add 2 teaspoons of the kosher salt and the baking soda. Add the potato chunks and boil for 7 to 8 minutes, until the outside edges look slightly soft and a knife slides in with a little resistance still at the center.
Step 2: Drain and rough up the surface.
Drain the potatoes in a colander and let them sit for 1 minute to steam off excess moisture. Shake the colander a few times, hard enough to scuff the outer layer of each potato chunk into a rough, slightly mashed-looking surface. This texture is what turns into the crunchiest part of the crust.
Step 3: Toss with oil and seasoning.
Transfer the potatoes to a large bowl. Add the olive oil, remaining 1 teaspoon of salt, black pepper, and garlic powder. Toss gently with a spatula rather than a spoon, so you coat the potatoes without knocking off the rough surface you just created.
Step 4: Roast.
Carefully pull the hot baking sheet from the oven and spread the potatoes across it in a single layer, cut side down where possible. Roast for 35 to 40 minutes, flipping once at the 20-minute mark, until deep golden brown and crisp at the edges. Don’t flip earlier than that or the crust will tear away and stick to the pan instead of the potato.
Step 5: Rest and finish.
Let the potatoes sit on the pan for 5 minutes off the heat, this lets the crust set so it doesn’t soften from residual steam. Toss with the fresh rosemary or thyme if using, and serve right away.
Tips
Cut the potatoes into pieces of even size so they finish roasting at the same rate. Don’t skip the rough-up step in the colander, it’s the single biggest factor in how crisp the final crust gets. If your oven runs hot or has uneven heat, rotate the pan front to back at the 20-minute flip.
Common Mistakes
Skipping the parboil: the potatoes go into the oven raw and mostly stay pale and soft on the outside because there isn’t enough surface starch to crisp. Fix: parboil for the full 7 to 8 minutes, until the edges look soft.
Crowding the pan: potatoes packed too close together trap steam instead of releasing it, so they end up boiled rather than roasted. Fix: use a single layer with space between pieces, or split between two pans.
Flipping too soon: turning the potatoes before the crust has set tears it off and leaves it stuck to the pan. Fix: leave them undisturbed until the 20-minute mark.
Using a cold pan: starting on a cold sheet means the potatoes spend the first several minutes steaming instead of crisping. Fix: preheat the pan in the oven before adding the potatoes.
Storage
Store leftover roasted potatoes in an airtight container in the refrigerator for up to 4 days. They’ll lose most of their crunch as they cool and sit, but reheating brings a good amount of it back.
Freezing
Freezing isn’t recommended for this recipe. The crisp crust is mostly dehydrated starch, and it turns soft and slightly mealy once the potatoes thaw, no reheating method fully brings it back. If you want to plan ahead, parboil and rough up the potatoes, then refrigerate them raw for up to a day before roasting.
Reheating
Reheat roasted potatoes in a 425°F (218°C) oven or air fryer for 8 to 10 minutes, spread in a single layer, until the crust crisps back up. Skip the microwave, it turns the crust rubbery instead of crisp.
Variations
Garlic-Parmesan: toss the hot potatoes with grated Parmesan and extra minced garlic right after roasting. Smoky paprika: add 1 teaspoon smoked paprika to the seasoning mix before roasting. Lemon-herb: finish with a squeeze of fresh lemon juice and chopped parsley instead of rosemary.
What to Serve With It
Roasted potatoes work well next to roast chicken, grilled steak, or pan-seared salmon. For breakfast, serve them alongside scrambled eggs and toast. They also hold up as a side for a simple green salad if you want a lighter meal.
FAQ
Why are my roasted potatoes not crispy? The most common cause is skipping the parboil-and-rough-up step, or crowding the pan so the potatoes steam instead of roast. Both steps matter more than the amount of oil you use.
Can I skip the baking soda? Yes, but the crust won’t be as crisp or as deeply browned, since baking soda speeds up the starch release that creates the craggy texture. A pinch is enough; too much can leave a slightly soapy aftertaste.
What’s the best potato for roasted potatoes? Yukon Golds give a creamy interior with a sturdy skin that holds together well. Russets get crispier on the outside but fall apart more easily if overcooked, so watch them closely.
Do I need to peel the potatoes? No. Leaving the skin on adds texture and saves time; just scrub them well before cutting.
Can I make crispy roasted potatoes ahead of time? Partially. You can parboil and rough up the potatoes a day ahead and refrigerate them raw, then roast just before serving. Fully roasted potatoes are best eaten right away, since the crust softens as they sit.
Crispy Roasted Potatoes
Ingredients
Equipment
Method
- Preheat oven to 450°F (232°C) with a rimmed baking sheet inside. Boil potatoes in salted water with baking soda for 7-8 minutes.
- Drain and shake in a colander to rough up the surface.
- Toss with olive oil, remaining salt, pepper, and garlic powder.
- Spread on the preheated sheet in a single layer. Roast 35-40 minutes, flipping once at 20 minutes.
- Rest 5 minutes, toss with herbs if using, and serve.
