01 - Wash the apples thoroughly and remove the cores. Using a mandoline slicer or sharp knife, slice the apples crosswise into thin rounds approximately 1/8 inch thick for uniform cooking.
02 - Pat the apple slices dry with paper towels to eliminate surface moisture, which helps achieve maximum crispiness during the air frying process.
03 - Place the apple slices in a single layer in the air fryer basket, ensuring no overlap. Cook in batches if necessary to maintain proper air circulation for even crisping.
04 - Lightly spray or brush the apple slices with oil if desired, though this step is optional and can be omitted for an oil-free version.
05 - Sprinkle ground cinnamon evenly over all the apple slices. Add the optional coconut sugar or maple sugar at this stage if you prefer extra sweetness.
06 - Air fry at 325°F for 12 to 15 minutes, flipping all slices halfway through after 7 minutes. Watch closely during the final minutes to prevent over-browning or burning.
07 - Transfer the golden apple chips to a wire rack immediately after cooking. Allow them to cool completely, as they will continue to crisp up during the cooling process.
08 - Once completely cooled, store the apple chips in an airtight container at room temperature for up to 5 days. If chips lose their crunch, re-crisp in the air fryer for 1 to 2 minutes before serving.