Preheat the air fryer: Set to 350°F (175°C) for 3–5 minutes so it’s hot when the apples go in.
Prep the apples: Wash and core each apple, leaving about 1/2 inch at the bottom intact to hold the filling. Widen the opening slightly with a spoon if needed.
Mix the filling: In a small bowl, combine cinnamon, vanilla, melted butter or coconut oil, and a pinch of salt. For the no added sugar option, stir in chopped dates if using. Otherwise, add maple syrup or honey.
Add crunch or fruit: Fold in nuts and raisins if you like. They add texture and sweetness.
Fill the apples: Spoon the mixture into each hollowed center, pressing down gently to pack it in.
Arrange in the basket: Place apples upright in the air fryer. Line with parchment to catch drips if your basket has large vents.
Air fry: Cook at 350°F (175°C) for 12–16 minutes. Check at 10 minutes. Apples are done when the flesh is tender when pierced and the tops look glossy and caramelized.
Rest and serve: Let them cool for 3–5 minutes. Serve warm as-is, or top with yogurt or ice cream.