Cut mozzarella sticks in half and freeze for 1 hour.
Set up a breading station with flour, beaten eggs, and breadcrumbs mixed with Italian seasoning and garlic powder.
Dip each mozzarella stick in flour, then egg, and finally breadcrumbs. Repeat for extra coating.
Place coated sticks in the freezer for 30 minutes.
Preheat the air fryer to 375°F (190°C).
Arrange mozzarella sticks in the air fryer basket in a single layer and spray lightly with cooking spray.
Cook for 5-7 minutes, turning halfway through, until golden and crispy.
Serve immediately with marinara sauce for dipping.