How to Cook Sweet Potatoes in an Air Fryer

Cut sweet potatoes into ¼-inch sticks, uniform in size. Soak in cold water for 30 minutes (optional but improves crispiness by removing surface starch). Dry completely — this is especially important for sweet potato fries since their high sugar content makes them prone to steaming and becoming mushy. Toss in ½–1 tsp oil, salt, and optional seasoning (cinnamon and brown sugar for sweet; cumin and paprika for savory). Preheat to 380°F. Cook for 8 minutes, shake, continue for 7–12 minutes. Sweet potato fries will never be as crispy as white potato fries — the high sugar content prevents the same crunch, but the caramelized edges are exceptional.

Cut into ¾-inch cubes for even cooking. Toss in 1 tsp oil, salt, and pepper — add garlic powder and smoked paprika for a savory version, or cinnamon and a drizzle of maple syrup for a sweet version. Preheat to 380°F. Spread in a single layer. Cook for 10 minutes, shake, continue for 8–12 minutes until the edges are deeply caramelized and a fork pierces the center easily. Cubes are more forgiving than fries — they have more mass and cook more evenly. Great for meal prep as they reheat well at 350°F for 4–5 minutes.

Pierce each potato 8–10 times with a fork. Rub lightly with oil and salt. Preheat to 375°F. Cook for 35–40 minutes for a 6–8 oz potato, turning once at 20 minutes. At 35 minutes, pierce at the thickest point — the fork should slide in with no resistance. Larger potatoes (over 10 oz) take 45–50 minutes. The skin becomes slightly wrinkled and the flesh is soft enough to scoop. Serve topped with butter, brown sugar and cinnamon, or for a savory option, with black beans, sour cream, and cheese.

Sweet potatoes contain significantly more natural sugar than white potatoes. At 400°F, the surface sugar caramelizes rapidly to char before the interior is fully cooked — the result is burnt exterior with a still-dense center. At 380°F, the sugar browns gradually and the interior has time to cook through. For frozen sweet potato fries, the package may suggest 400°F — reduce to 390°F for best results.

How long do you air fry sweet potato fries?

Fresh-cut sweet potato fries take 15–20 minutes at 380°F (195°C), shaken once at 8–10 minutes. Thin fries (¼ inch): 13–16 minutes. Thick fries (½ inch): 18–22 minutes. Toss in 1 tsp oil, salt, and optional spices before cooking. Spread in a single layer — crowding produces soft rather than crispy fries. Sweet potatoes have higher sugar content than regular potatoes and can burn at 400°F, so 380°F is safer. If using frozen sweet potato fries, cook at 390°F for 15–18 minutes.

What temperature is best for sweet potato in an air fryer?

Sweet potato fries: 380–390°F (195–200°C) to prevent the natural sugars from burning before the fries cook through. Whole sweet potatoes: 390°F (199°C) for 35–45 minutes depending on size, pierced before cooking. Sweet potato cubes: 400°F (205°C) for 15–20 minutes, tossed in oil and seasoning. The higher sugar content of sweet potatoes compared to regular potatoes means they need slightly lower temperatures or shorter high-heat periods to avoid charring.