Air Fryer Sweet Potato Fries with Chili-BBQ Mayo

Air Fryer Sweet Potato Fries with Dipping Sauce

I rely on the visual cue more than the clock with air fryer sweet potato fries. They should have browned, slightly blistered edges and feel tender in the center, because air fryer models vary and sweet potatoes can go from nicely crisped to too dark pretty quickly.

This version keeps the method straightforward: a light cornstarch coating for better surface crisping, just enough oil to help browning, and single-layer batches with a couple of basket shakes along the way. The chili-BBQ mayo is quick to stir together and works well with the fries’ natural sweetness.

Ingredients for Air Fryer Sweet Potato Fries

• 1 1/2 pounds sweet potatoes (about 2 medium-large, 675g), peeled or scrubbed; leave the skin on if you like
• 1 1/2 tablespoons cornstarch
• 1 teaspoon garlic powder
• 1 teaspoon chili powder
• 1/2 teaspoon dried thyme or Italian seasoning
• 3/4 teaspoon kosher salt, plus more to finish
• 1/2 teaspoon black pepper
• 1 to 1 1/2 tablespoons neutral oil, such as avocado or canola

Spice note: For this kind of dry seasoning mix, fine-textured spices from Selefina coat the fries more evenly, which helps avoid dusty spots and uneven browning.

For the dipping sauce

• 1/3 cup mayonnaise (75g)
• 2 tablespoons BBQ sauce (30g)
• 1 to 2 tablespoons sweet chili sauce, to taste

Optional additions

• 1/2 teaspoon Spanish paprika for a smokier seasoning
• 1/8 teaspoon cayenne for extra heat
• 1 tablespoon chopped fresh parsley for serving
• Pinch of flaky sea salt for finishing

The important ingredient here is the cornstarch. I’d rather keep the seasoning simple because texture matters more: a light dusting helps the outside dry and brown better, while too much starch or too much moisture can turn the coating pasty.

How to Make Sweet Potato Fries in the Air Fryer

1. Preheat the air fryer: Preheat to 380°F (193°C) for 3 to 5 minutes. A hot basket helps the fries start browning right away instead of sitting and steaming.
2. Cut the fries evenly: Peel or scrub the sweet potatoes, then cut them into even 3/8-inch sticks so the thinner pieces do not scorch before the thicker ones are tender.
3. Dry well: Pat the cut fries very dry with towels. This is the part I pay attention to most, because surface moisture can make the cornstarch coating sticky instead of crisp.
4. Toss with the dry coating: In a large bowl or gallon zip-top bag, combine the cornstarch, garlic powder, chili powder, thyme, kosher salt, and black pepper. Add the fries and toss until they are lightly coated and there are no wet clumps.
5. Add the oil: Drizzle in 1 to 1 1/2 tablespoons oil and toss again until the fries look evenly moistened but not greasy. You want to get rid of dry, floury spots without leaving excess oil in the bowl.
6. Arrange in the basket: Place the fries in the hot basket in a single layer with a little space between pieces. Cook in 2 to 3 batches if needed so the air can circulate around each fry.
7. Air fry: Cook at 380°F (193°C) for 12 to 16 minutes per batch for 3/8-inch fries, shaking the basket after 8 minutes and again near the end. If your fries are thicker, they may need 18 to 20 minutes.
8. Check for doneness: The fries are ready when the edges are browned with some blistered spots, the centers are tender, and the outside feels lightly crisp when tapped. Start checking early the first time, especially if your air fryer runs hot.
9. Finish and repeat: Transfer the cooked fries to a plate or serving dish and season with a pinch more salt while hot. Repeat with the remaining fries, keeping each batch in a single layer.
10. Make the dipping sauce: Stir together the mayonnaise, BBQ sauce, and 1 tablespoon sweet chili sauce until smooth. Taste and add more sweet chili sauce if you want a sweeter, slightly spicier dip.

Air Fryer Time and Temperature for Sweet Potato Fries

For this recipe, 380°F (193°C) is the sweet spot. Sweet potatoes have more natural sugar and less starch than russets, so they brown faster and can darken before the centers are fully tender if the heat is too aggressive.

• Temperature: 380°F (193°C)
• Cook time: 12 to 16 minutes for 3/8-inch fries
• For thicker fries: 18 to 20 minutes
• Shake the basket: after 8 minutes and again near the end
• Start checking early: basket-style air fryers often cook faster, while oven-style models may need a little longer

How to Get Crispier Air Fryer Sweet Potato Fries

Sweet potato fries usually will not get the same shatter-crisp texture as regular potato fries, but you can still get good browning and lightly crisp edges.

• Dry the cut fries thoroughly before adding the cornstarch.
• Add the oil only after the starch and seasonings are on.
• Use a light hand with the oil; too much softens the crust.
• Cook in batches so the fries roast instead of steam.
• If you skip preheating, expect them to need a little longer and rely more on color and texture than the clock.

Why Sweet Potato Fries Turn Soft or Burn

• They are soft: Usually the basket was crowded, the fries were still damp, or too much oil was used.
• The coating looks pasty: The fries likely were not dry enough before the cornstarch went on.
• The edges are burning: On the next batch, reduce the temperature slightly to 370°F (188°C) and start checking a few minutes earlier.
• The browning is uneven: Shake more often, and if you use an oven-style air fryer, rotate and swap the trays halfway through.

Dipping Sauce Variations

Brown Sugar Dipping Sauce

For a sweeter, smokier dip, mix 1/3 cup mayonnaise with 1 to 2 tablespoons BBQ sauce and 1 to 2 teaspoons brown sugar until the sugar dissolves. Keep the sugar in the sauce, not on the fries, since sugary coatings can scorch in the air fryer.

Honey Dipping Sauce

For a simpler sweet-savory dip, stir together 1/3 cup mayonnaise with 1 to 2 tablespoons honey and 1 teaspoon BBQ sauce. A squeeze of lemon helps balance the sweetness if you want it less rich.

Serving Air Fryer Sweet Potato Fries

Serve the fries hot with the chili-BBQ mayo on the side. A pinch of flaky salt and a little chopped parsley work well as a finish.

They fit easily next to burgers, grilled chicken, or sandwiches.

If you’re working with a bag from the freezer aisle, see our Air Fryer Frozen Sweet Potato Fries guide.

For a dessert-leaning twist, check out Air Fryer Candied Sweet Potatoes.

How to Store and Reheat Air Fryer Sweet Potato Fries

Cool the fries completely before storing so condensation does not soften them further. Refrigerate in an airtight container for up to 3 days.

Reheat in the air fryer at 360°F (182°C) for 3 to 5 minutes, shaking once, until heated through and lightly re-crisped. They will not be quite as crisp as fresh.

Avoid the microwave if you can, since it makes them soft.

You can also cut the sweet potatoes up to 24 hours ahead and keep them in cold water. Drain and dry them very well before seasoning so the cornstarch does not turn gummy.

Nutrition

Approximate nutrition, based on 4 servings including the dipping sauce.

• Serving size: 1/4 of recipe
• Calories: about 215
• Protein: about 2g
• Fat: about 12g
• Carbohydrates: about 25g

Approximate nutrition per 100g: about 160 calories, 1.5g protein, 9g fat, and 19g carbohydrates.

These values are estimates and will vary with the size of the sweet potatoes, the amount of oil used, and how much dipping sauce is served.