Crispy Air Fryer Sweet Potato Fries

Name: Crispy Air Fryer Sweet Potato Fries
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Yield: 4 servings
Cuisine: American
Ingredients: 2 pounds (about 3 medium) (900 g) medium sweet potatoes, scrubbed, peeled if desired, cut into ¼-inch (6 mm) thick sticks about 3 inches (7.5 cm) long; 8 cups (1900 ml) cold water, for soaking; 2 tablespoons (16 g) cornstarch; 1½ tablespoons (20 ml) olive oil; 1 teaspoon (2½ g) smoked or sweet paprika; ½ teaspoon (1½ g) garlic powder; ¾ teaspoon (4 g) fine sea salt, plus more to taste; ¼ teaspoon (½ g) black pepper, freshly ground

From the MyKitchenBank Kitchen

Golden, crisp-edged sweet potato fries made with a soak and a light cornstarch coating, so they come out crunchy outside and tender inside with just a little oil. Smoky paprika seasoning makes them a perfect side for burgers, sandwiches, or grilled chicken.

Prep: 15 min
Cook: 20 min
Wait: 30 min
Total: 1 hr 5 min
Makes: About 4 side servings (roughly 4 cups of fries)

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Steps

Before you start

Plan on a 5–6 quart (4.7–5.7 L) basket-style air fryer. Smaller models need to cook the fries in 3 batches.
Choose sweet potatoes of similar thickness so the fries cut to a uniform size and cook evenly.
The 30-minute cold water soak removes surface starch and is key to crispness, so don't skip it.
Do not crowd the basket. Fries steam instead of crisp when piled deep.

1
Cut the fries
- Scrub the sweet potatoes well.
- Peel them if you like, or leave the skin on for more texture.
- Trim the ends, then cut each potato lengthwise into ¼-inch (6 mm) thick planks, and stack the planks and cut into ¼-inch (6 mm) sticks about 3 inches (7.5 cm) long.
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Ready when: Sticks are roughly the same thickness, with no pieces thicker than ⅓ inch (8 mm).
Tip: Even thickness matters more than perfect length. Thick pieces stay soft while thin ones burn.
2
Soak in cold water
- Put the cut fries in a large bowl and cover with the 8 cups (1.9 L) cold water.
- Let them soak for 30 minutes at room temperature to draw out surface starch.
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Ready when: Water looks slightly cloudy.
3
Dry thoroughly
- Drain the fries in a colander.
- Spread them on a clean kitchen towel or several layers of paper towels, cover with another towel, and press firmly to blot.
- Dry for 2–3 minutes, swapping in fresh towels if they soak through.
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Ready when: Fries feel dry to the touch, with no visible water beads.
Tip: Any leftover moisture turns to steam in the air fryer and makes limp fries.
4
Preheat air fryer
- Preheat the air fryer to 400°F (200°C) for 3–5 minutes while you season the fries.
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Ready when: Air fryer reads or has run at 400°F (200°C).
Tip: If your air fryer has no preheat setting, run it empty at 400°F (200°C) for 4 minutes.
5
Coat with cornstarch
- Place the dried fries in a large mixing bowl.
- Sprinkle the cornstarch over them and toss with your hands for about 30 seconds, until no dry white powder is visible and the fries look lightly matte.
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Ready when: Fries look evenly dusted with no clumps or white patches.
Tip: Add the cornstarch before the oil, since oil first makes it clump.
6
Add oil and spices
- Drizzle the olive oil over the fries.
- Sprinkle on the paprika, garlic powder, salt, and pepper.
- Toss gently until every fry is evenly coated and glossy.
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Ready when: Fries are evenly orange-red with a thin sheen of oil.
7
Air fry first round
- Arrange half the fries (about 450 g / 1 lb) in a single loose layer in the basket, with a little overlap but not stacked deeply.
- Air fry at 400°F (200°C) for 8 minutes.
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Ready when: Fries are softened and starting to brown at the edges.
Tip: Cook in two batches for the crispiest result, even in a large air fryer.
8
Shake and finish
- Pull out the basket and shake well or toss with tongs to separate the fries.
- Return it and cook 4–7 minutes more, checking at 4 minutes.
- Move the finished fries to a plate and repeat with the second batch.
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Ready when: Edges are deep golden brown and slightly crisp, and a fry bends only a little when lifted.
Tip: Sweet potatoes burn quickly because of their sugar. Watch the last 2 minutes closely.
9
Season and serve
- Return the first batch to the basket with the second for the final 1–2 minutes to re-heat, or serve straight away.
- Taste, then sprinkle with a pinch more salt if needed.
- Serve hot, since fries soften as they sit.
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Ready when: Fries are hot, with crisp edges.
Tip: Fries crisp further as they cool for a minute or two on the plate, so don't overcook them.

Good to know

Tips

Cut fries evenly. Thin pieces burn before thick ones soften.
Don't overfill the basket. Two batches give much crispier fries than one crowded batch.
Serve with a dip such as garlic yogurt, chipotle mayo, or ketchup.
Air fryers vary. Check at the earliest time given and add a minute at a time.

Make ahead

"Cut the sweet potatoes up to 1 day ahead and keep them submerged in cold water in the fridge. Drain and dry them very well before coating and cooking."

Storage & reheating

Best eaten right away. Room temperature: up to 2 hours. Fridge: airtight container up to 3 days. Freezer: not recommended, as they turn soft. Reheat in the air fryer at 375°F (190°C) for 3–5 minutes until sizzling and crisp, never in the microwave.

Substitutions

cornstarch → arrowroot powder or potato starch. Use the same amount, 2 tablespoons (16 g). Results are equally crisp.
olive oil → avocado oil. Has a higher smoke point and a more neutral flavor.
smoked or sweet paprika → chili powder or cajun seasoning. Use 1 teaspoon and reduce the salt slightly if the blend is salty.
garlic powder → onion powder. Same amount for a slightly sweeter savory flavor.