Preheat your air fryer: Set it to 375°F (190°C) for 3–5 minutes.
A hot basket helps the pepperoni crisp faster and more evenly.
Prep the basket: Line it with a piece of parchment trimmed to fit, or use a perforated liner to reduce sticking. Avoid foil if your air fryer manual advises against it.
Arrange the slices: Lay pepperoni in a single layer with a little space between each slice. Crowding leads to uneven crisping.
Work in batches if needed.
Season lightly (optional): A small pinch goes a long way since pepperoni is already salty. Try black pepper or a dusting of garlic powder.
Air fry: Cook for 3–5 minutes, checking at the 3-minute mark. Thin slices crisp fast.
You’re aiming for curled edges and a deeper color.
Blot and cool: Transfer crisps to a paper towel–lined plate to drain excess oil. Let them sit 2–3 minutes to firm up fully.
Finish and serve: Sprinkle with Parmesan while warm for a cheesy crust, or add a touch of red pepper flakes. Serve with marinara or ranch.