Sweet potato chips from the air fryer sound like a dream—naturally sweet, crunchy, and quick. But too often, they turn out limp and chewy. The secret to that satisfying snap lies in a few simple steps before the chips even hit the basket.
This recipe walks you through exactly how to slice, soak, dry, and season sweet potatoes for chips that rival any store-bought bag. With an air fryer, you get that deep golden crisp without a pot of hot oil.
Once you master the technique, you can play with seasonings and make them your own. Let’s get started.
Why This Works
- Thin, even slices cook at the same rate, so you don’t end up with burnt edges and raw centers.
- Soaking in cold water pulls out excess starch, which is the main culprit behind soggy chips.
- Thorough drying is critical—any surface moisture will steam the potatoes instead of crisping them.
- A light coating of oil helps conduct heat and promotes browning without making the chips greasy.
- Air frying at a moderate temperature (300°F [150°C]) gives the natural sugars time to caramelize without burning.
What You Need
- Mandoline or sharp chef’s knife
- Large bowl
- Clean kitchen towel or paper towels
- Air fryer
- Tongs
- Wire cooling rack
Ingredients
- 1 1/2 lb [680 g] sweet potatoes, scrubbed
- 1 tablespoon vegetable oil or avocado oil
- 1/2 teaspoon fine sea salt, plus more to taste
- Optional black pepper, smoked paprika, garlic powder, or cinnamon
Instructions
- Slice the Potatoes. Using a mandoline or a very sharp knife, slice the sweet potatoes into rounds about 1/16 inch [1.5 mm] thick. Aim for paper-thin but still sturdy enough to hold their shape. If you have a mandoline, set it to the thinnest setting. Consistent thickness is the most important factor for even cooking.
- Soak in Cold Water. Place the slices in a large bowl and cover with cold water. Let them soak for at least 20 minutes, or up to an hour if you have time. You’ll see the water turn cloudy—that’s the starch releasing. Drain and rinse the slices well under cold running water.
- Dry Completely. Lay the slices out in a single layer on a clean kitchen towel or several layers of paper towels. Pat them very dry with another towel on top. Any moisture left on the surface will create steam and prevent crisping. Take your time here—this step makes all the difference.
- Toss with Oil and Seasoning. Transfer the dry slices to a dry bowl. Drizzle with the oil and sprinkle with the salt (and any dry seasonings you’re using). Toss gently with your hands until every slice has a thin, even coating. You want them lightly slick, not drenched.
- Preheat the Air Fryer. Preheat your air fryer to 300°F [150°C] for about 3 minutes. Preheating helps the chips start crisping immediately. If your air fryer doesn’t have a preheat setting, just run it empty for a few minutes.
- Arrange in the Basket. Place the seasoned slices in the air fryer basket in a single layer with little to no overlap. You’ll likely need to cook in 2 or 3 batches—crowding will trap steam and give you soggy chips. It’s better to work in batches for the best texture.
- Air Fry in Batches. Cook at 300°F [150°C] for 15 to 20 minutes, shaking the basket or flipping the chips with tongs every 5 minutes. Watch closely after the 12-minute mark; thinner slices may brown faster. Remove chips as they turn golden and feel dry and crisp to the touch. Some may still feel slightly soft but will crisp up as they cool.
- Cool and Finish. Transfer the finished chips to a wire cooling rack in a single layer. They will continue to crisp as they cool for about 5 minutes. Sprinkle with a little extra salt while still warm if desired. Once completely cool, they’re ready to enjoy.
Tips for the Best Results
- Use a mandoline for the most consistent thin slices; it’s worth the investment if you make chips often.
- Don’t skip the soak—even 20 minutes makes a noticeable difference in crispness.
- Dry the slices as if your crunch depends on it, because it does. Press firmly with towels.
- Cook in small batches. A single layer with space around each chip allows the hot air to circulate.
- Let the chips cool on a rack, not a plate, or they’ll steam on the bottom and lose their crunch.
- Season right after cooking while still warm so the salt sticks, but wait to add any fresh herbs or delicate spices until after cooling to prevent scorching.
Troubleshooting
Chips came out soggy
The most common causes are not drying the slices thoroughly after soaking, overcrowding the air fryer basket, or not cooking long enough. Pat slices completely dry, arrange in a single layer with space between each chip, and cook until they feel crisp—they should not bend easily.
Storing and Re-Crisping
Cool leftovers within 2 hours. Store completely cooled chips in an airtight container at room temperature for up to 2 days. To re-crisp, spread them in a single layer in the air fryer at 300°F [150°C] for 2 to 3 minutes, then let cool again on a rack. They will not be as crunchy as fresh but will regain much of their snap.
Variations to Try
- Smoky Chipotle: Toss with smoked paprika, a pinch of chipotle powder, and a little garlic powder.
- Cinnamon Sugar: After cooking, sprinkle with a mix of cinnamon and a touch of sugar while still warm.
- Salt and Vinegar: Soak slices in a mix of 1 cup water and 1/4 cup white vinegar for 30 minutes instead of plain water, then pat dry and cook as directed.
- Garlic Herb: Add dried rosemary, thyme, and garlic powder to the oil before tossing.
- Spicy Lime: Toss cooked chips with a squeeze of fresh lime juice, chili powder, and a pinch of cayenne.
Frequently Asked Questions
Why do my sweet potato chips burn before they get crispy?
Sweet potatoes have natural sugars that can burn at high heat. Cooking at 300°F [150°C] instead of a higher temperature gives them time to dehydrate and crisp without the sugars scorching. Also, make sure your slices are very thin and even.
Can I make these without soaking the potatoes?
You can, but they will almost certainly be less crisp. Soaking removes surface starch that otherwise turns gummy when cooked. If you’re short on time, even a quick 10-minute soak helps.
Do I need to peel the sweet potatoes?
Peeling is optional. The skin adds a rustic look and extra texture, but it can become a bit chewy. For the crispiest result with a more uniform texture, peel them. If you keep the skin, scrub it very well.
My chips are chewy, not crunchy. What went wrong?
Chewy chips usually mean they were sliced too thick or not cooked long enough. Thin, even slices and cooking until they are visibly dry and firm in the basket are key. Remember they will crisp further as they cool.
Can I use a different oil?
Yes, any neutral oil with a high smoke point works well. Avocado oil, grapeseed oil, or light olive oil are good choices. Avoid extra-virgin olive oil as it can smoke and impart a bitter taste.
How do I keep the chips from sticking to the air fryer basket?
Lightly coating the slices in oil is usually enough to prevent sticking. If you find they still stick, you can line the basket with a perforated parchment paper liner made for air fryers, but make sure it doesn’t block airflow. Never use solid parchment without holes.