CUT the string cheese into thirds, making 18 pieces.
MIX together the flour, cornstarch, salt, and pepper in a bowl. Whisk together the eggs and milk in a separate bowl. Combine the panko breadcrumbs and parsley flakes in an additional bowl.
COAT each piece of cheese with flour, then dip in egg, and then roll in breadcrumbs. Dip in egg and breadcrumbs again.
SELECT Preheat on the Cosori Air Fryer, adjust to 350°F, and press Start/Pause.
SET the mozzarella bites in the freezer while the air fryer is preheating.
PLACE the coated mozzarella bites into the preheated air fryer and spray liberally with cooking spray.
SELECT Frozen Foods, set time for 8 minutes, and press Start/Pause.
SHAKE the baskets halfway through cooking (the Shake Reminder function will let you know when!).
SERVE with a side of your favorite marinara sauce, or even better, ranch.