In a Ziploc bag, combine the milk, pickle juice, and egg.
Place the chicken inside the bag, seal, and let this marinade at least 4 hours or overnight. Be sure to place it inside another bowl or pan in case it leaks.
Once you are ready to cook the chicken, combine the flour, salt, paprika, and ground pepper in another Ziploc Bag.
Take the chicken out of the marinade, letting the excess marinade drip off it and then place it inside the bag with the flour mixture.
Seal and shake the bag so that all the chicken is well coated with the mixture
Carefully remove the chicken from the bag, shaking off the excess flour and place in the basket of your air fryer.
Coat with cooking spray.
Cook in the air fryer at 400°F for 8-10 minutes, turn the chicken, spray with cooking oil spray, and cook for an additional 3-4 minutes. If floury, coat with additional spray.
Be sure the chicken reaches an internal temperature of 165°F.
Serve.