Air Fryer Sweet Potato Fries (Crispy in 15 Minutes)
These air fryer sweet potato fries come out crisp on the outside and soft inside in about 15 minutes. My method is simple: cut them thin, toss them in a little oil and a spoonful of cornstarch, and air fry at 380°F for 12 to 15 minutes, shaking the basket halfway. The cornstarch is what makes the difference.
Below you’ll find the recipe, why sweet potato fries go soggy and how to stop it, how they compare to regular fries on USDA nutrition numbers, plus seasonings and dips. One batch serves 3 as a side, at about 179 calories per serving.
What Makes Air Fryer Sweet Potato Fries Crispy?
Three things: a light cornstarch coating, an even thin cut, and a single layer in the basket. Sweet potatoes hold more sugar and moisture than regular potatoes, so they brown fast but soften easily. A tablespoon of cornstarch dries the surface and gives each fry a thin, crisp shell.
- Cut them evenly. About ¼ inch thick. Uneven fries mean some burn while others stay limp.
- Dry them well. Pat the cut fries with a towel before the oil goes on. Surface water steams them.
- Don’t crowd the basket. Cook in batches so hot air can reach every side.
What Do You Need?
- 2 medium sweet potatoes, about 1 pound. Peeling is optional; the skin crisps nicely if you scrub it well.
- 1 tablespoon cornstarch. The crisping secret. Arrowroot or potato starch work too.
- 1 tablespoon olive or avocado oil. Just enough to help the starch stick and the edges brown.
- Salt, smoked paprika, garlic powder and black pepper. Smoked paprika plays well with the natural sweetness.
How Do You Make Sweet Potato Fries in the Air Fryer?
Cut the sweet potatoes into ¼-inch fries, pat them dry, toss with oil, then dust with cornstarch and seasoning until no dry spots remain. Air fry at 380°F for 12 to 15 minutes in a single layer, shaking the basket halfway through. They crisp up a little more as they cool for a minute. Full amounts are in the card.
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Air Fryer Sweet Potato Fries
Ingredients
Method
- Cut the sweet potatoes into even fries about 1/4 inch thick. Pat them dry with a clean towel.
- Toss the fries with the oil in a large bowl until lightly coated.
- Sprinkle the cornstarch, salt, smoked paprika, garlic powder and pepper over the fries and toss until no dry spots remain.
- Arrange the fries in a single layer in the air fryer basket, working in batches so they don’t overlap.
- Air fry at 380°F (195°C) for 12 to 15 minutes, shaking the basket halfway through, until browned at the edges.
- Let them rest 1 minute so they crisp up, then serve right away.
Notes
- Batches: a crowded basket steams the fries; cook in 2 batches if needed.
- Thicker cuts: add a few minutes and check every 2 minutes.
- Reheat: 2 to 3 minutes at 380°F in the air fryer, not the microwave.
- Nutrition is per serving (1 of 3), calculated from USDA FoodData Central (FDC 168482, 169698, 171413); vitamin A is about 118% of the Daily Value per serving.
Sweet Potato Fries vs Regular Fries: How Do They Compare?
Per 100 grams raw, sweet potatoes have 86 calories, 3.0g of fiber and 709 micrograms of vitamin A, while regular potatoes have 77 calories, 2.1g of fiber and no vitamin A, according to USDA FoodData Central. Regular potatoes win on vitamin C and potassium, so neither is simply “better”.
| Per 100g, raw | Sweet potato | Regular potato |
|---|---|---|
| Calories | 86 | 77 |
| Fiber | 3.0g | 2.1g |
| Vitamin A | 709 µg (79% DV) | 0 µg |
| Vitamin C | 2.4mg | 19.7mg |
| Potassium | 337mg | 425mg |
Put simply, one serving of these fries covers more than a full day’s vitamin A, about 118% of the Daily Value, because the batch uses about a pound of sweet potato. Air frying also keeps the oil to one tablespoon for the whole batch.
Why Are My Sweet Potato Fries Soggy?
- The basket was too full. Overlapping fries steam each other. Cook in two batches.
- They went in wet. Dry them before oiling, and skip the cornstarch at your own risk.
- They’re cut too thick. Thicker pieces stay soft in the middle. Keep them around ¼ inch.
- You judged them straight out of the basket. Give them a minute on the tray; they firm up as the steam escapes.
Seasonings and Dipping Sauces
Smoked paprika and garlic are the everyday mix. For something different, try cinnamon and a pinch of cayenne, or toss the hot fries with a drizzle of homemade hot honey right before serving. For dipping, a bowl of whipped cottage cheese with chives and garlic gives you a high-protein ranch-style dip.
Can You Cook Sweet Potato Cubes or Wedges the Same Way?
Yes, with the same cornstarch, oil and 380°F, but bigger pieces need more time. Cut them evenly, keep them in a single layer, and start checking a few minutes after the fry time, then every 2 minutes until a fork slides in easily and the edges brown. More air fryer sides to try: air fryer roasted vegetables and crispy cottage cheese chips.
How Do You Store and Reheat Them?
Keep leftovers in an airtight container in the fridge for up to 3 to 4 days. To bring the crunch back, reheat them in the air fryer at 380°F for 2 to 3 minutes. The microwave makes them soft. They’re also a good side next to a dense bean salad for a meal-prep lunch.
Frequently Asked Questions
How long do you cook sweet potato fries in the air fryer?
About 12 to 15 minutes at 380°F for ¼-inch fries in a single layer, shaking the basket halfway through. Thicker cuts need a few more minutes, so check them every 2 minutes after that.
Why do you put cornstarch on sweet potato fries?
Cornstarch dries the surface of the fries and forms a thin coating that crisps in the hot air. One tablespoon is enough for about a pound of sweet potatoes.
Do you need to soak sweet potato fries before air frying?
No. With a cornstarch coating you can skip soaking. Just pat the cut fries dry before tossing them with oil and cornstarch.
Are sweet potato fries healthier than regular fries?
They’re different rather than simply healthier. Per 100g raw, sweet potatoes have more fiber and much more vitamin A, while regular potatoes have more vitamin C and potassium, according to USDA FoodData Central. Air frying either one keeps the oil low.
Sources
- USDA FoodData Central: Sweet potato, raw (FDC 168482); Potatoes, flesh and skin, raw (FDC 170026); Cornstarch (FDC 169698); Oil, olive (FDC 171413); retrieved 2026-10-01. fdc.nal.usda.gov
- U.S. Food and Drug Administration, Daily Value on the Nutrition and Supplement Facts Labels (vitamin A 900 µg), retrieved 2026-10-01. fda.gov
