Preheat air fryer to 350°F for 3 to 5 minutes. Lightly spray the air fryer basket with oil. Dice apples into ¼-inch pieces and pat completely dry with paper towels.
2 medium apple, oil spray
In a medium bowl, mix all-purpose flour, granulated sugar, baking powder, and ground cinnamon together.
1.5 cups all-purpose flour, 0.33 cup granulated sugar, 2 tsp baking powder, 1 tsp ground cinnamon
In a separate bowl, whisk together milk, egg, and vanilla extract until combined.
0.5 cup milk, 1 large egg, 1 tsp vanilla extract
Pour wet ingredients into dry ingredients and stir gently with a fork until just combined. Some lumps are fine; avoid overmixing to prevent dense fritters.
Fold in diced apples gently until coated. Scoop ¼ cup portions of batter onto parchment circles or directly into the greased air fryer basket, leaving 1 inch between each. Flatten slightly to about ½-inch thick rounds. Spray tops lightly with oil.
2 medium apple, oil spray
Air fry for 10 to 12 minutes until edges are golden brown and center feels firm to touch. Check at 8 minutes; if browning too fast, reduce temperature to 325°F. Remove and let cool on wire rack for 5 minutes before glazing.
While fritters cool, whisk powdered sugar with 2 tablespoons milk until smooth and pourable. Add more milk teaspoon by teaspoon if needed. Drizzle or dip warm fritters in glaze. Let set 2 to 3 minutes before serving.
1 cup powdered sugar, 2-3 tbsp milk