Sweet Potato Fries in the Air Fryer
Air fryer sweet potato fries can be crisp on the outside and tender inside, but only if you handle their high sugar and moisture. A short soak, a dry surface and a spoonful of cornstarch do the job. They take about 18 minutes at 380 °F, and the table also gives times for frozen and thick-cut fries.
- Temperature
- 380°F190 °C
- Total time
- 58min
- Prep time
- 10min
- Servings
- 3
- Per serving
- 180kcal
Why the air fryer works for sweet potato fries
Sweet potatoes contain more sugar and moisture than russets, and that is why oven fries often end up limp. The sugar browns quickly and burns, and the extra water steams the fries. The air fryer solves both problems. Circulating air dries the surface fast, and a short, medium-high cook keeps the sugars from scorching.
A thin starch coating does the final job. Cornstarch absorbs the moisture that rises to the surface and sets into a crisp shell. That is why this recipe uses cornstarch instead of flour: it browns lightly and stays crisp as the fries cool.
How to make sweet potato fries in the air fryer
Tap a time to start a timer.
- Cut the fries Peel the sweet potatoes, or leave the skin on if you like it. Cut them into sticks about ¼ inch thick and 3 inches long, so they finish at the same time.
- Soak Soak the sticks in a bowl of cold water for . This pulls out some surface sugar and starch, which helps them crisp instead of turning soft and sticky.
- Dry well Drain and dry the fries thoroughly with a clean kitchen towel. Leftover water will steam them in the basket.
- Coat Toss the fries with the oil, then sprinkle over the cornstarch, paprika, garlic powder and salt and toss again until each stick has a thin, even coat.
- Cook Preheat the air fryer to 380 °F for . Add the fries in a single loose layer and cook for , shaking the basket every . If your basket is small, cook half at a time.
- Check and serve The fries should be golden with darker tips and should hold their shape when you lift one. They crisp more as they cool for . Serve with your favorite dip.
Times and temperatures
| Sweet Potato Fries | Temperature | Time |
|---|---|---|
| Fresh, ¼ inchShake every 6 min | 380 °F (190 °C) | 18 min |
| Thin, ⅛ inch | 380 °F (190 °C) | 12–14 min |
| Thick, ½ inch | 380 °F (190 °C) | 20–22 min |
| FrozenNo extra oil | 400 °F (200 °C) | 12–15 min |
| No cornstarchSofter fries | 380 °F (190 °C) | 16–18 min |
Times are a guide and depend on the size and wattage of your air fryer. See also air fryer cooking times for all foods.
Read also: Frozen foods in the air fryer – times from frozen
Tips
- Cut straight, even sticks. Fries of different thickness finish at different times, so pull the thin ones early.
- Keep the temperature moderate. Above 400 °F, the sugar burns before the fries are crisp.
- Serve right away. Sweet potato fries soften as they sit, so plan to serve them within a few minutes of cooking.
What to serve with sweet potato fries
Serve the fries with a dip such as chipotle mayo, ranch or honey mustard, and with hamburgers, chicken nuggets or salmon. If you like regular potatoes, crispy french fries use a similar method. For whole sweet potatoes and cubes, see sweet potatoes.
Storing and reheating
Leftover fries keep for 2 days in a sealed container in the refrigerator, but they will have lost most of their crunch. Reheat them in the air fryer at 375 °F for 3–4 minutes, shaking once, until hot and crisp at the edges. Do not microwave them.
Variations
- Cinnamon sugar: Skip the paprika and garlic. Toss the hot fries with 1 tsp cinnamon and 2 tsp brown sugar.
- Spicy: Add ¼ tsp cayenne and ½ tsp chili powder to the coating.
- Parmesan and herbs: Toss the hot fries with 1 tbsp grated parmesan and chopped parsley (not vegan or dairy-free).
If it does not turn out right
- The fries are limp
- Sweet potatoes hold more moisture than white ones. Dry them completely, use the cornstarch, cook in one layer and do not crowd the basket.
- The ends burn before the rest is done
- The sticks were uneven or too thin. Cut them to ¼ inch thick, and remove any darker pieces early while the rest finish.
- The fries stick to the basket
- Sugar caramelizes on contact with the metal. Brush the basket lightly with oil, shake often and loosen stuck fries with tongs.
Questions and answers
How long do sweet potato fries take in the air fryer?
About 18 minutes at 380 °F for fresh fries ¼ inch thick, shaken every 6 minutes. Thin fries need 12–14 minutes and thick-cut fries take 20–22 minutes.
Can you cook frozen sweet potato fries in the air fryer?
Yes. Cook them at 400 °F for 12–15 minutes, shaking twice. No oil is needed. Check the package for the best time.
Do I need cornstarch for crispy sweet potato fries?
It helps a lot. The starch forms a dry crust, and without it the fries are tender and slightly soft. Skip it only if you do not mind softer fries.
Can I make sweet potato fries without oil?
You can use a light mist of oil from a pump sprayer, about ½ teaspoon per pound. They come out drier and less golden, and the cornstarch will not stick as well without any oil.
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