In a shallow dish, place the flour.
In a second shallow dish, mix together the eggs and milk.
In a third dish, place the breadcrumbs.
Coat the Mozzarella sticks with flour, then dip into egg mixture and finally, coat with the breadcrumbs.
Arrange the mozzarella sticks onto a baking sheet and freeze for about 1-2 hours.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 390 °F to preheat for 5 minutes.
After preheating, arrange the mozzarella sticks into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 6-8 minutes.
After cooking time is finished, remove the mozzarella sticks from Air Fryer and serve.