Prep the apples: Wash and dry. You can leave the peel on. Core if you prefer, or keep the star-shaped centers for a pretty look. Slice into very thin rounds—about 1/16–1/8 inch. A mandoline helps, but a sharp knife works with patience.

Optional soak: If you want extra insurance against browning, toss slices with lemon juice and a tablespoon of water. Pat dry thoroughly with paper towels so they crisp instead of steam.

Season: In a small bowl, mix cinnamon with a pinch of nutmeg and ginger. Add a tiny pinch of salt. If using sugar, stir it in now. Lightly sprinkle the mix over both sides of the apple slices. Don’t overdo it—too much coating can burn.

Preheat the air fryer: Set to 300°F (150°C) for a few minutes. A slightly lower temperature helps dry the apples evenly without scorching the spices.

Arrange in a single layer: Lightly mist the basket with oil if sticking is a concern. Lay the apple slices in a single layer without overlap. Work in batches for best results.

Air fry: Cook for 12–18 minutes, flipping halfway. Start checking at 10 minutes. Slices should look dry and lightly curled at the edges. Remove any that finish early and keep the rest going.

Finish and cool: Transfer chips to a wire rack and let them cool for 5–10 minutes. They’ll crisp up more as they cool. If some are still a bit soft, return them to the air fryer for 1–3 more minutes.

Taste and adjust: Sprinkle a touch more cinnamon or a tiny pinch of sugar if you want extra sweetness. Enjoy warm or fully cooled for max crunch.