Air Fryer Sweet Potato Fries with Sriracha Mayo

Air Fryer Sweet Potato Fries with Sriracha Mayo

What I like about this air fryer method is that it focuses on the details that matter most for sweet potato fries: even cuts, very dry surfaces, a light cornstarch coating, and enough space in the basket. Sweet potatoes have more natural sugar and a softer texture than russets, so I rely on color and texture more than the clock here.

This version keeps the ingredient list short and the process practical for a weeknight side or snack. You get browned edges, tender centers, and a quick 3-ingredient Sriracha mayo that is easy to make milder or hotter.

Ingredients for Air Fryer Sweet Potato Fries with Sriracha Mayo

• 1 1/2 pounds sweet potatoes (about 2 medium, 675g to 680g)
• 1 to 1 1/2 tablespoons cornstarch
• 1 to 1 1/2 tablespoons canola oil, avocado oil, or light olive oil
• 3/4 teaspoon kosher salt, plus more to taste
• 1/4 teaspoon fine ground black pepper
• 1/2 cup mayonnaise (120g)
• 1 to 2 tablespoons Sriracha, to taste
• Pinch to 1/8 teaspoon cayenne pepper

Optional additions: 1/2 teaspoon smoked paprika, 1/4 teaspoon garlic powder, 1 to 2 teaspoons lemon or lime juice for the sauce, and chopped parsley or green onions for serving.

Ingredient note: Keep the cornstarch light. The fries should look barely dusted, not white or powdery, or the coating can turn chalky instead of helping the surface crisp.

How to Cut Sweet Potatoes for Even Air Frying

Stick close to 1/4-inch thick fries for this recipe. Thicker pieces take longer and stay softer, while very thin edges can darken too fast because sweet potatoes brown quickly in the air fryer.

I usually look for pieces that are close in size so the whole batch finishes together instead of leaving me with a mix of underdone centers and burned tips.

How to Make Sweet Potato Fries in the Air Fryer

1. Cut the sweet potatoes: Peel if you like, then cut them into 1/4-inch sticks. Trim off very thin tips and small end pieces so they do not burn before the thicker fries are done.
2. Soak if you have time: Place the cut fries in a bowl, cover with cold water, and soak for 20 to 30 minutes. Drain well. This step is optional, but it can help the fries cook up a little better.
3. Dry very well: Spread the fries on clean kitchen towels or paper towels and pat them thoroughly dry. This is where the texture can go wrong. If the fries go into the bowl wet, they steam instead of brown.
4. Season the fries: Transfer the dry fries to a large bowl and toss with the cornstarch until lightly coated with no clumps. Add the oil, salt, black pepper, and smoked paprika or garlic powder if using, then toss again until the fries have a light sheen.
5. Preheat the air fryer: Preheat to 380°F (193°C) for 3 to 5 minutes. A hot basket or tray helps the outside start browning sooner.
6. Cook the first batch: Arrange the fries in a single layer with a little space between them. Air fry at 380°F (193°C) for 14 to 18 minutes, shaking the basket or flipping the fries halfway through, around 7 to 8 minutes. Start checking around 12 minutes.
7. Watch for doneness: The fries are ready when the edges are deep golden with a few darker caramelized spots, the outside feels lightly crisp, and the centers are tender. They should hold their shape when lifted instead of bending heavily.
8. Cook the remaining batches: Repeat with the rest of the fries. Keep cooked batches on a sheet pan uncovered while the others finish so they do not soften from trapped steam.
9. Make the Sriracha mayo: In a small bowl, whisk together the mayonnaise, Sriracha, and cayenne until smooth. Taste and adjust the heat. If you want a looser dip, whisk in a little lemon or lime juice or a small splash of water.
10. Finish and serve: Taste a fry and add another pinch of salt if needed. Serve hot with the Sriracha mayo.

Air Fryer Time and Temperature for Sweet Potato Fries

Cook sweet potato fries at 380°F (193°C) for about 14 to 18 minutes. Shake or flip halfway through, and start checking a little early if your air fryer runs hot.

I rely on the visual cue more than the timer here because air fryer models vary. Basket-style air fryers often cook a little faster, while oven-style models may need tray rotation halfway through for more even browning.

Do You Need to Soak Sweet Potatoes Before Air Frying?

No, but a 20 to 30 minute soak can help a little. The bigger factor is drying them well afterward.

If you skip the soak, the fries can still turn out well. Just expect slightly softer results and be extra careful not to crowd the basket.

Why Are My Air Fryer Sweet Potato Fries Soggy?

• The basket was crowded: Too many fries trap steam, so cook in batches if needed.
• The fries were cut too thick: Fries closer to 1/4 inch cook more evenly with this timing.
• The fries were still damp: Surface moisture is the main thing that keeps them from crisping.
• Too much cornstarch was used: A heavy coating can turn gummy or chalky.
• The fries needed more color: Sweet potato fries often soften if they come out pale. Look for browned edges and a few darker spots.

Sriracha Mayo Variations

Simple Sriracha Mayo

For a milder dip, stir together just the mayonnaise and Sriracha and leave out the cayenne. Start with the smaller amount of Sriracha and add more as needed.

Brown Sugar Mayo Dip

For a sweeter contrast, stir a little brown sugar into the mayonnaise and skip the Sriracha and cayenne. Add a tiny splash of lemon juice or water if you want it a little looser, and balance it with a small pinch of salt.

For a different dip, see these fries with Chili-BBQ Mayo.

Serving Air Fryer Sweet Potato Fries

Serve these hot with the Sriracha mayo and an extra pinch of salt right before eating. They work well with burgers, grilled chicken, or sandwiches.

A little chopped green onion or parsley on top adds freshness and color. Cooking from frozen instead? Try our Air Fryer Frozen Sweet Potato Fries method.

How to Store and Reheat Air Fryer Sweet Potato Fries

Let leftover fries cool completely. Refrigerate them in a shallow container lined with paper towels, leaving the container uncovered for about 15 minutes before sealing so extra steam can escape. Store the Sriracha mayo separately for up to 1 week.

To make ahead, cut the fries up to 24 hours in advance and keep them submerged in cold water in the refrigerator. Drain and dry them very well before seasoning and air frying.

To reheat, preheat the air fryer to 350°F to 370°F (177°C to 188°C) and cook for 4 to 6 minutes, shaking once halfway through. A light spray of oil can help if they look dry. They can crisp back up around the edges, but they will not be quite as crisp as when freshly cooked.

Nutrition

Approximate nutrition per serving, based on 4 servings: 310 calories, 2g protein, 21g fat, 30g carbohydrates.

Approximate nutrition per 100g: 175 calories, 1g protein, 12g fat, 17g 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 with each portion.