Wash, peel and cut the sweet potatoes into ¼ inch thick fries. You may also use mandolin which works best to cut evenly sized fries.
In a large bowl, soak the fries in cold water and let them sit for about 15-30 minutes (removes excess starch in sweet potatoes). Drain the water well and dab the fries dry with a kitchen towel.
Put the fries in a bowl. Add olive oil, garlic powder, corn starch, red chili powder, salt, pepper. Toss them well, so they are all coated with the seasoning.
Preheat the air fryer to 380°F (193°C). Add the seasoned fries to the air fryer basket and spread them in a single layer (cook in batches if required). Make sure not to overcrowd them.
Air fryer them at 380°F (193°C) for 12-14 minutes or until crispy and golden. Toss the fries halfway through. If your fries are not crispy then air fry them a bit longer. Cook time will depend on the thickness of your fries.
Serve Sweet Potato Fries hot and enjoy with ketchup.
Oven Method
Preheat the oven to 425°F and line a baking sheet with parchment paper. Spread the seasoned fries evenly in a single layer. Bake at 425˚F for 35-40 minutes, tossing occasionally or until the fries are crispy and golden.
Notes
Pro-Tips & Notes
Cut fries into the same size: This helps to cook evenly and at the same rate
Cook in batches. Make sure to spread the fries in a single layer in the air fryer basket without overcrowding, Cook in batches if needed.
Shake the basket halfway: It's important to shake the basket halfway through to allow the fries to be cooked evenly.
If you want extra crispy fries, then toss your sweet potato fries in cornstarch before air frying.
Make sure to soak sweet potato fries in cold water for 15-30 minutes as they help to remove excess starch, prevent fries from sticking, and make them more crispy.
You can use any kind of sweet potato variety.
Serve crispy sweet potato fries straight after air frying as they lose their crispiness as the time goes on.
The exact cooking time will vary based on the air fryer being used.
Note: Nutrition values are my best estimates. If you rely on them for your diet, use your preferred nutrition calculator.