Ingredients:

Dough for single-crust pie (store-bought or homemade)
1 cup sugar
1/4 cup cornstarch
2 cups milk
1/2 cup butter
1 teaspoon vanilla extract
1/4 teaspoon ground cinnamon

Instructions:

Preheat your air fryer to 375°F (190°C).
Roll out the dough for a single-crust pie on a lightly floured surface to a 1/8-inch thickness. Transfer the dough to a pie plate, trimming the edges to leave about 1/2 inch beyond the rim of the plate. Crimp the edges of the crust. Place the pie crust in the refrigerator for 30 minutes to chill.
Line the chilled pie crust with a double layer of aluminum foil, pressing it gently into the bottom and sides. Fill the foil-lined crust with pie weights, dried beans, or uncooked rice to prevent it from puffing up during baking.
Place the pie crust in the air fryer basket and air fry at 375°F (190°C) for about 10-12 minutes, until the edges are lightly golden brown. Remove the foil and weights.
In a saucepan, combine the sugar and cornstarch. Gradually stir in the milk until smooth. Bring the mixture to a boil over medium heat, stirring constantly. Cook and stir for 2 minutes, or until thickened and bubbly.
Remove the saucepan from the heat and stir in the butter and vanilla extract until well combined.
Pour the thickened sugar mixture into the partially baked pie crust in the air fryer basket. Sprinkle the ground cinnamon over the top.
Return the pie to the air fryer and continue to air fry at 375°F (190°C) for another 12-15 minutes, or until the pie is golden brown and set.
Remove the pie from the air fryer and let it cool on a wire rack. Once cooled, refrigerate the pie before serving.