I start by peeling my sweet potatoes, though you can leave the skin on for extra fiber and nutrients. Then, I cut them into evenly sized cubes, about ½ inch each, so they cook at the same rate. I toss the cubes in olive oil, salt, and pepper, making sure each piece is lightly coated for even crisping.
Next, I preheat the air fryer to 400°F (200°C) and arrange the cubes in a single layer in the basket. Overcrowding makes them steam instead of crisp. I cook them for 15-20 minutes, shaking or stirring halfway through to ensure all sides get golden brown and crunchy.
Once they’re golden and tender, I remove them from the air fryer and taste for seasoning. Sometimes I add a tiny pinch more salt or a sprinkle of smoked paprika for extra flavor. They’re best served immediately while still warm and crispy.