Ultra-Crispy Roast Potatoes Recipe (2024)

  • Roasted Potatoes
  • Dairy-free Sides
  • Roasted Vegetables
  • Russet Potatoes
  • Thanksgiving Side Dishes

By

J. Kenji López-Alt

Ultra-Crispy Roast Potatoes Recipe (1)

J. Kenji López-Alt

Culinary Consultant

Kenji is the former culinary director for Serious Eats and a current culinary consultant for the site. He is also a New York Times food columnist and the author of The Food Lab: Better Home Cooking Through Science.

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Updated March 10, 2022

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Ultra-Crispy Roast Potatoes Recipe (2)

Why It Works

  • Parboiling the potatoes with a hint of vinegar builds strong pectin bonds and a starchy outer layer of potato.
  • Tossing the parboiled potatoes in a bowl with a metal spoon creates microscopic nooks and crannies that make for an extra-crunchy exterior.
  • Roasting in animal fat adds extra crispness and rich flavor.

How often do you get roasted potatoes that look like they're going to be awesomely crisp, only to find that rather than crispness, all you've got is a papery (or, worse, leathery) skin on the exterior? Getting truly crisp potatoes is harder than it seems. Simply tossing them in a bit of oil and roasting them just doesn't work.

The problem is that with simple roasting, they'll crisp up, all right, but the layer of crispness will be very, very thin. Within moments, steam from the interior of the spud will cause the crisp bits to soften.

So what is it that makes a potato crisp?

Well, as I found out when exploring French fries last year, it's a dehydrated layer of gelatinized starch that does it. The thicker the layer of gelatinized starch you can build up, the crisper the potato. You accomplish this by parboiling the cubed potatoes, and, just as with making French fries, adding a touch of acid to the boiling water acts as insurance against accidentally over-boiling them—the pectin that holds potato cells together is strong in slightly acidic environments.

Ultra-Crispy Roast Potatoes Recipe (3)

Want to know the secret to even crisper roast potatoes? Increase surface area. The more surface area a potato has for a given volume, the more bits there are to crisp up, and the crunchier it'll become. The potatoes above have been parboiled, then tossed roughly in a bowl with a metal spoon until their surfaces were roughed and scratched up. All those microscopic nooks and crannies will make for an extra-crunchy surface.

Potato Variety

You can use any type of potatoes you like for this, but there's a tradeoff:

  • Starchy russet potatoes will produce the crispest crust because of their high starch content, with fluffy, powdery interiors.
  • Yukon gold potatoes (what I've used here) will produce crusts that are still very crisp, but not quite as crisp as that of a russet. They'll also have interiors that are more creamy than fluffy. Some people like this contrast of textures. I'm on the fence, so I usually alternate between the two varieties.
  • Red waxy potatoes will have the creamiest texture of all, but will lack a very strong, crisp crust. I don't recommend them for this purpose.

Fat

Next question: What's the best fat to use?

Well, if you can get your hands on it, this:

Ultra-Crispy Roast Potatoes Recipe (4)

People often tout the awesomeness of duck fat with potatoes, and for good reason: It tastes awesome. Duck fat has a distinct richness and aroma that get absorbed very easily into the surface of a spud. On top of that, it's got plenty of saturated fat and a high smoke point, which makes it an ideal medium for crisping up fried or roasted foods. (In general, the higher the saturated fat content of an oil, the more efficiently it'll crisp foods.) Can't get duck fat? Well, turkey fat or chicken fat collected from roasted birds will do just fine.

Bacon fat and rendered lard are also fine choices, as is just about any sort of animal-derived fat.

If you must use it, extra-virgin olive oil will certainly do admirably well, though you won't get quite the same level of crispness you'd get out of an animal fat.

Once your potatoes are tossed in fat and seasoned well, all you've got to do is roast them in an extremely hot oven until they crisp up. (I do this while my turkey is resting.)

I roast mine directly on a heavy rimmed baking sheet—they have a tendency to stick to foil. The key is to make sure you let the underside crisp up completely before you even attempt to lift or flip them. If the potatoes don't come off relatively easily, you run the risk of breaking off the tops, leaving the crisp bottom cemented to the bottom of the pan. This is not an ideal situation.

Moral: Your potatoes will release themselves from the pan when they're good and ready. Don't force them.

Finally, make way more than you think you'll need. Not only do these potatoes lose a great deal of volume as they roast, it also appears that dinner guests suddenly gain a great deal of volume in their stomachs when the potatoes hit the table.

November 04, 2011

Recipe Details

Ultra-Crispy Roast Potatoes Recipe

Prep5 mins

Cook50 mins

Active30 mins

Total55 mins

Serves8to 10 servings

Ingredients

  • 4 1/2 pounds (2kg) russet potatoes (see note), rinsed, peeled if desired, and cut into 2-inch chunks

  • Kosher salt

  • 1 tablespoon (15ml) white vinegar

  • 1/4 cup (60ml) duck fat (see note)

  • Freshly ground black pepper

  • 12 sprigs thyme

Directions

  1. Adjust oven racks to lower and upper positions and preheat oven to 500°F (260°C). Place potatoes in a large saucepot and cover with cold water by 1 inch. Add 2 tablespoons (28g) salt and vinegar. Bring to a boil over high heat, reduce to a simmer, and cook until exteriors are tender, about 5 minutes. Potatoes should show slight resistance when poked with a paring knife or a cake tester. Drain potatoes and transfer to a large bowl.

  2. Add fat to bowl with potatoes. Season with pepper and more salt to taste, then toss with a large metal spoon until exteriors are slightly bashed up and coated in a thin layer of potato/fat paste. Divide potatoes evenly between 2 heavy rimmed baking sheets. Spread thyme sprigs over potatoes.

    Ultra-Crispy Roast Potatoes Recipe (6)

  3. Transfer baking sheets to oven and roast until bottoms of potatoes are crisp and golden brown, about 20 minutes total, swapping trays top for bottom and rotating them once halfway through roasting. Using a thin metal spatula, flip potatoes and roast until second side is golden brown, another 15 to 20 minutes. Discard thyme sprigs and serve.

    Ultra-Crispy Roast Potatoes Recipe (7)

Special Equipment

Rimmed baking sheets

Notes

For creamier potatoes with a slightly less crisp crust, substitute Yukon gold potatoes. Duck fat, turkey fat, or chicken fat will give the best results, but bacon fat or olive oil will also work well.

Read More

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  • How to Roast Fall and Winter Vegetables | The Food Lab
Nutrition Facts (per serving)
245Calories
5g Fat
44g Carbs
5g Protein

×

Nutrition Facts
Servings: 8to 10
Amount per serving
Calories245
% Daily Value*
Total Fat 5g7%
Saturated Fat 2g9%
Cholesterol 5mg2%
Sodium 343mg15%
Total Carbohydrate 44g16%
Dietary Fiber 5g17%
Total Sugars 2g
Protein 5g
Vitamin C 18mg92%
Calcium 42mg3%
Iron 2mg13%
Potassium 1132mg24%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

Ultra-Crispy Roast Potatoes Recipe (2024)

FAQs

How do I keep my roast potatoes crispy? ›

If you want to make this roast potatoes day before recipe and keep the potatoes crispy, ensure you put them in hot oil before baking them. This will help the potatoes stay crispy. If you're preparing roast potatoes in advance and find they have gone soggy in the fridge.

Why won't my roast potatoes go crispy? ›

Roast the potatoes

Remove the steamed potatoes from the oven and change the setting to 350°F/180°C, convection setting (no steam). While the oven heats, drain the potatoes of any water and return them to the tray. Give them a good shake around to crush the edges slightly, this will help make them extra crispy later.

Do you have to boil potatoes before roasting them? ›

Do I have to boil potatoes before roasting? Not necessary but this can help get the perfect consistency and crispiness. Make sure you boil them but leave them a bit al dente and they will crisp up perfectly in the oven.

What is the best oil for roast potatoes? ›

Goose fat is one of the first choices for roast potatoes because first of all – it tastes nice! It has a really rich flavour compared to your more common vegetable oils. It's a bit like how cooking your roast potatoes in dripping from your turkey can add more flavour to your spuds too – they're both animal fats.

What makes potatoes crunchy? ›

Parboiling the potatoes in alkaline water breaks down their surfaces, creating tons of starchy slurry for added surface area and crunch. Offering you the choice of oil, duck fat, goose fat, or beef fat means you can get whichever flavor you want.

Why won't my potatoes get crispy in oil? ›

A: This sure sounds a lot like potatoes that have been stored too long, in too cold of an environment before cooking. When potatoes are held below 41°F for too long a period, the starches convert to sugar and it changes the cooking chemistry.

What happens if you don't soak potatoes before roasting? ›

Soaking potatoes in water helps remove excess starch. Excess starch can inhibit the potatoes from cooking evenly as well as creating a gummy or sticky texture on the outside of your potatoes.

What does cornstarch do to potatoes? ›

When the corn starch comes into contact with the hot oil, it forms a barrier that traps moisture within the potato while also developing a crunchy crust. This results in fries that are both tender on the inside and crispy on the outside, mimicking the texture of fries you might find in restaurants.

Why put flour on roast potatoes? ›

Here's a few tricks to try to make them even more delicious. Sprinkle your parboiled potatoes with flour. This gives potatoes extra crunch. A tablespoon is all you need!

Which type of potatoes are best for roasting? ›

For an easy roast that's a great summer staple you can use quick-cooking New, Baby or Salad potatoes. These tend to be more moist or 'waxy' in texture, so you'll get a denser more creamy inside than with a 'traditional' roastie, and more potatoey flavour.

How does Gordon Ramsay make roast potatoes crispy? ›

The key to crunchy roasties is getting a fluffy exterior before they go in the oven. Drain the potatoes well and give them a moment to steam and dry out further. Then don't be afraid to shake the colander or pan vigorously to rough up the edges before you add the oil.

What happens if you don't boil roast potatoes? ›

You can, but you don't need to boil them first. Boiling them won't make them more crispy, but it will make them more tender. The best way to make them crispy is to boil them, then shallow fry them to dry and begin the browning process, then finish them off in the oven.

Can you put too much oil in roast potatoes? ›

Also, be mindful of the oil. Potatoes can react like sponges; too much oil can make your potatoes appear to be soggy. Try placing oil in a spray bottle or using an aerosol to apply the oil to the potatoes. Lastly, ensure that the potatoes are dry before you add the oil.

What pan is best for roast potatoes? ›

Best Overall: Nordic Ware Naturals Big Sheet Baking Pan

This classic aluminum sheet pan is a workhorse in the kitchen, whether you're making sheet-pan dinners, baking cookies or roasting vegetables. We love the simplicity of Nordic Ware's Naturals line, which is made from uncoated aluminum.

Should you coat potatoes in oil before baking? ›

Skip rubbing your potatoes in oil and salt until the end of the cooking time. That's when they'll deliver the most texture and flavor benefit for the spuds.

How to stop roast potatoes from going soft? ›

If it's for a short time, just spread them on a half-sheet pan and stick in a 200F oven. Because it's below 212F the potatoes won't keep cooking and because the oven is dry, they will stay crispy. If it's going to be longer, allow them to cool below 200F, put in a large bowl and seal well with oven-safe plastic wrap.

How do you keep roast potatoes from getting mushy? ›

Try placing oil in a spray bottle or using an aerosol to apply the oil to the potatoes. Lastly, ensure that the potatoes are dry before you add the oil. Excess moisture will increase the cooking time of potatoes and may result in soggy spuds.

How do you keep roast potatoes crispy when transporting? ›

Using foil with openings: If you need to transport the roast potatoes or keep them warm on the go, you can cover the container with foil, leaving small openings for steam to escape. This method allows some heat to be retained while preventing excessive condensation that can make the potatoes soggy.

How do you keep potatoes crispy for a potluck? ›

If transporting right away, leave them uncovered; otherwise let them cool completely to room temperature, then place them in an airtight container and refrigerate. Don't cover while they're warm or they'll lose their crispiness.

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