Thin-sliced sweet potato rounds tossed with olive oil, cornstarch, garlic powder, dried thyme, and a shower of grated Parmesan, air-fried until golden and crunchy.
Slice thickness is the single biggest factor in crispiness: aim for exactly 1/8 inch on a mandoline; slices thicker than 1/4 inch will stay leathery and never crisp properly.
Do not skip or reduce the cornstarch; it forms the dry coating that drives off surface moisture and creates the chip-like crunch. Substituting arrowroot starch works equally well in the same amount.
Add the Parmesan only after the first fry cycle, never before; cheese added at the start will burn and turn bitter before the potatoes are cooked through.
Do not peel the sweet potatoes before slicing; the skin holds each round together, adds texture, and contributes fiber.
Store cooled chips in an airtight container at room temperature for up to 2 days; reheat at 350°F for 3 minutes in the air fryer to restore crispness. Do not refrigerate as condensation will make them soggy.
Source: Chef Rocky
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Added to the cookbook by Meg · Jun 11, 2026 · Last touched by Meg · Jun 11, 2026