Preheat the air fryer to 380°F (193°C) for even cooking and better texture

Peel, core, and slice apples into evenly sized rings to ensure uniform cooking

In a bowl, mix flour, half of the sugar, and half of the cinnamon to create a dry coating

In another bowl, whisk eggs and milk together until smooth to form the batter

Dip each apple ring into the batter, ensuring it is fully coated

Lightly coat the battered rings with the flour mixture for a crisp finish

Place the rings in the air fryer basket in a single layer without overlapping for even cooking

Air fry for 7–9 minutes, flipping halfway through, until golden and tender

Brush the hot apple rings with melted butter immediately after cooking

Toss them in the remaining cinnamon sugar mixture until evenly coated

Serve warm for the best flavor and texture