In a medium mixing bowl, stir together melted butter, maple syrup, vanilla and cinnamon.
2 tablespoons (28 grams) butter, 1/4 cup (60 milliliters) maple syrup, 2 teaspoons vanilla extract, 1 teaspoon ground cinnamon
Add the peeled and sliced apples and toss to coat them in the liquid.
4 (810 grams or 1.75 pounds) sweet apples
If you have the type of air fryer basket where you can directly place the apples, then grease the basket. If you have a different style, then grease an air fryer-safe dish that’s large enough for all the apples and that will fit in your air fryer.
Transfer the apples (and all the liquid) to the greased air fryer basket or dish.
Preheat the air fryer to 375 °F (190 °C).
Cook for 12 minutes. Then stir to make sure the apples are well coated in the liquid, and cook for another 8-15 minutes, or until they’re soft enough for your liking.
Remove the apples from the air fryer and let them sit for 10 minutes and then serve. The liquid will gel a little as it cools.
Cool any leftovers and refrigerate in an airtight container for up to 5 days.