01 - Peel, core, and slice the apples into 1/4-inch wedges. Choose firm varieties that hold their shape during cooking.
02 - In a large bowl, whisk together the melted butter, granulated sugar, and ground cinnamon until smooth and well combined.
03 - Add the prepared apple wedges to the butter mixture. Toss gently but thoroughly to ensure every slice is evenly coated with the cinnamon-sugar glaze.
04 - In a separate shallow bowl, combine the quick oats (or gluten-free breadcrumbs), flour, and salt. Mix well to distribute evenly.
05 - Working in batches, press each buttered apple slice into the dry mixture, turning to coat both sides. Shake off any excess coating.
06 - Place the coated apple slices in a single layer in your air fryer basket. Avoid overcrowding to ensure proper air circulation and even crisping.
07 - Cook at 375°F for 10–12 minutes. Shake the basket halfway through cooking time to promote even browning. The apples are done when golden brown and crispy on the outside while tender inside.
08 - Transfer the crispy apples to a serving platter. Enjoy warm, optionally topped with whipped cream or vanilla ice cream for a classic dessert finish.