These Crispy Air Fryer Sweet Potato Fries With Cornstarch are golden and crisp on the outside while remaining tender and flavorful inside. With just a few pantry ingredients and a short soaking step, these seasoned fries crisp up beautifully in the air fryer and make a perfect side or snack. Fair warning: they’re addictive.
The first thing I tried after buying my air fryer was this recipe—and the fries turned out ultra-crispy. I’ll admit I grazed on the first batch while waiting for the next to finish. They’re that good.
This recipe has been made thousands of times and is one of my most popular. Pair the fries with your favorite dipping sauce and serve alongside burgers, chicken, or roasted vegetables for a satisfying meal.
Why you will love this recipe
- Simple and quick to prepare with common ingredients.
- The air fryer cooks the fries quickly and evenly for consistent crispness.
- Faster than baking in the oven and with less oil than deep-frying.
- Family-friendly—both kids and adults enjoy them.
- Easy cleanup—wipe and rinse the air fryer basket once cooled.
Recipe Ingredients
Only a few ingredients are needed and most are pantry staples. Use fresh sweet potatoes for best flavor and texture.
Ingredient Notes:
- Sweet potatoes: Wash and peel (optional if organic) and slice into even fries for uniform cooking.
- Olive oil: Helps the fries brown and crisp. Avocado or vegetable oil work too.
- Cornstarch: The key to an extra-crispy exterior; arrowroot can substitute if needed.
- Seasonings: A simple blend of garlic powder, paprika, black pepper, and sea salt. Adjust salt to taste after cooking if desired.
See the printable recipe card below for exact quantities and full instructions.
Variations
- Add a pinch of cayenne for heat.
- Mix in other spices such as onion powder, oregano, chili powder, thyme, or Cajun seasoning.
- Top with shredded cheese and crumbled bacon after cooking.
- Finish with grated Parmesan and chopped parsley.
- For a sweet twist, dust with cinnamon sugar or drizzle with honey after air frying.
If you prefer a convenience option, you can air fry frozen sweet potato fries using your air fryer’s instructions for frozen fries.
How to make crispy air fryer sweet potato fries
Quick Overview
- Slice sweet potatoes into evenly sized fries.
- Soak in cold water to remove excess starch.
- Dry thoroughly.
- Toss with cornstarch, seasonings, and oil.
- Arrange in a single layer in the air fryer basket.
- Air fry until golden and crispy, shaking the basket occasionally.
Step By Step Instructions
Step 1: Wash and peel the sweet potatoes. For a family of four I used seven small sweet potatoes (about 1.5 pounds).
Step 2: Slice each potato lengthwise into quarters, then cut each quarter into ¼-inch-wide fry shapes for even cooking.
Step 3: Aim for fries about ¼ inch wide so they crisp up evenly.
Step 4: Place the fries in a large bowl and cover with cold water. Soak at least one hour or up to overnight. Soaking removes excess starch and helps the fries become crisp on the outside while staying tender inside.
Pro Tip: Don’t skip the soak—fries that aren’t soaked usually won’t reach the same level of crispiness.
Step 5: Drain and dry the fries thoroughly on paper towels—moisture prevents crisping.
Step 6: Toss the dry fries with cornstarch, garlic powder, paprika, salt, and pepper until evenly coated—the cornstarch will blend in. Add the oil and toss again.
Step 7: Drizzle with olive oil and mix. Preheat the air fryer to 400°F (200°C).
Step 8: Arrange fries in a single layer in the basket with space between pieces. Do not overcrowd—air circulation is essential. Cook 15 minutes, shaking the basket and tossing every 5 minutes for even browning.
Pro Tip: If your air fryer is small, cook in multiple batches. I often do two or more batches depending on the quantity.
Step 9: Remove fries once they reach your desired crispness and repeat with remaining batches.
Step 10: Serve immediately with ketchup or your favorite dips.
FYI
I’ve tested these fries in both basket-style and oven-style air fryers. Results vary by model: basket-style units tend to crisp better. Adjust time if your fries are thicker or if your air fryer runs hot or cool.
Serving Suggestions
These fries pair well with burgers, chicken, fish, or a hearty salad. They also complement smoky mains and simple weeknight proteins for a complete plate.
Expert tips
- Cut fries uniformly so they cook at the same rate.
- Soak in cold water to remove surface starch—this helps crispness.
- Dry thoroughly before coating with cornstarch and oil.
- Do not overcrowd the air fryer; cook in batches if needed.
- Use oil to promote browning and crisp texture.
- Shake the basket every 5 minutes for even cooking.
- Watch thinner ends closely so they don’t burn.
- If needed, return fries to the air fryer for one or two extra minutes to reach desired crispiness.
Storage
Fridge: Store leftovers in an airtight container for up to 2 days.
Freezer: Flash-freeze fries on a parchment-lined baking sheet, then transfer to a freezer bag for up to 3 months.
Reheat: Reheat in the air fryer for a few minutes to restore crispness.
Recipe FAQs
Soaking draws out excess starch, which helps the fries achieve a crisp exterior while staying tender inside.
Peeling is optional. If not peeling, buy organic or scrub the skin thoroughly before cutting.
Common causes are not preheating the air fryer, overcrowding the basket, fries cut too thick, or not using enough oil. Correcting these will improve crispiness.
More easy air fryer recipes
-
Extra Crispy Air Fryer Chicken Wings
-
Air Fryer Halibut with Panko Parmesan Crust
-
Air Fryer Thin Pork Chops
-
Extra Crispy Air Fryer Potatoes
Still Craving More?
Try other air fryer favorites like teriyaki salmon, crispy gnocchi, or shrimp tempura for variety.
If you enjoyed these Crispy Air Fryer Sweet Potato Fries With Cornstarch, consider leaving a rating and sharing your results on social media.
Printable Recipe
Crispy Air Fryer Sweet Potato Fries With Cornstarch
Ingredients
- 7 small sweet potatoes (or 4 medium)
- 3 tsp cornstarch
- 3 tbsp olive oil
- 3/4 tsp garlic powder
- 3/4 tsp paprika
- 1/2 tsp sea salt
- 1/8 tsp black pepper
Instructions
- Wash and peel the sweet potatoes. Cut each into quarters lengthwise, then slice each quarter into ¼-inch fries.
- Place the fries in a large bowl and cover with cold water. Soak at least 1 hour or overnight.
- Drain and pat the fries completely dry on towels.
- Toss fries with cornstarch, garlic powder, paprika, sea salt, and black pepper until evenly coated. Add olive oil and toss again.
- Preheat the air fryer to 400°F. Arrange fries in a single layer with space between pieces; do not overcrowd. Cook 15 minutes, shaking the basket and tossing every 5 minutes. Repeat with remaining batches.
- Serve hot with your favorite dipping sauce.
Notes
- Cut fries the same size for even cooking.
- Avoid overcrowding the basket.
- Shake the basket every 5 minutes.
- Cook a little longer if you want extra crispiness.
Nutrition
Nutrition information is an estimate and not guaranteed to be exact.