Prep the carrots: Peel and trim the carrots.
Cut them into uniform sticks, about 1/2-inch thick. Thicker sticks won’t burn as easily and hold a better bite.
Preheat the air fryer: Set your air fryer to 390–400°F (200°C). Preheating helps the fries start crisping right away.
Dry the carrots: Pat the carrot sticks dry with a clean kitchen towel or paper towels.
Moisture is the enemy of crispness.
Season: In a large bowl, toss the carrots with oil. Sprinkle in cornstarch and toss again to lightly coat. Add salt, pepper, garlic powder, smoked paprika, onion powder, and cayenne if using.
Toss until every piece is seasoned.
Arrange in the basket: Place the carrots in the air fryer basket in a single layer. A little overlap is okay, but avoid crowding. Work in batches if needed.
Cook: Air fry for 12–16 minutes, shaking the basket halfway through.
Start checking at 10 minutes. They’re done when edges are browned and the centers are tender with a bit of bite.
Taste and finish: Sprinkle with a little extra salt while hot. Squeeze on lemon for brightness and add fresh herbs if you like.
Serve: Enjoy immediately with your favorite dip.
These are best hot and crisp.