Sweet potato fries are notorious for going soggy — but a light dusting of cornflour fixes that, and the air fryer crisps them golden. Here's the trick.
Key takeaways
Q: How do you make crispy sweet potato fries in an air fryer?
A: Toss the fries in a little cornflour and oil, then air fry at 200°C (400°F) for 15–18 minutes, shaking, until crisp.
Q: Why do they go soggy?
A: Sweet potato is moist and low in starch. Cornflour and a single layer are the fix.
The crispy trick
Cut even, fairly thin fries, then toss them with a tablespoon of cornflour and a little oil — the cornflour forms a crisp shell. Cook in a single layer (in batches if needed) and shake regularly. Don't overcrowd, or they'll steam.
The recipe
Crispy Air Fryer Sweet Potato Fries
Ingredients
- 2 sweet potatoes, in fries
- 1 tbsp cornflour
- 1 tbsp oil
- Salt, paprika
Method
- Toss the fries with cornflour, then oil and spice.
- Single layer; air fry at 200°C for 15–18 min.
- Shake every 5 minutes.
- Season and serve.
Tips
- Cornflour first, then oil — that's the crisp.
- Thin, even fries crisp best.
- Don't overcrowd — batch if you need to.
Frequently asked questions
How do you make sweet potato fries crispy in an air fryer?
Toss them in a tablespoon of cornflour and a little oil, cook in a single layer at 200°C for 15–18 minutes, and shake regularly.
Why are my sweet potato fries soggy?
Sweet potato is moist and low in starch, and overcrowding steams them. Cornflour and a single layer are the fix.
Are sweet potato fries healthy?
They're high in fibre and vitamins, and air frying with a little oil keeps them far lighter than deep-fried.