Place chicken pieces and pickle juice in a plastic bag. Close and place in the refrigerator for 20-30 minutes.
Meanwhile, in a shallow bowl whisk together egg and milk.
In another bowl, whisk together flour, corn starch, powdered sugar, salt, paprika, onion powder, garlic powder, and black pepper. Set Aside.
Remove chicken pieces from the refrigerator. Grease the Air Fryer basket with a little oil. Coat chicken pieces in egg mixture, then coat it in flour mixture, then shake off any excess flour and place it in the basket.Repeat until the bottom of the air fryer basket is full. Make sure none of the pieces are overlapping nor should they be touching.
Close the air fryer basket and cook on 360 degrees Fahrenheit for 12 minutes, flipping halfway. Spray any flour spots when flipping.
After 12 minutes is up, increase the heat to 400 degrees Fahrenheit and cook for an additional 2 minutes. Remove and serve with your favorite dipping sauce.
You can use this technique and batter to make chicken tenders, chicken sandwiches, etc. As always, different air fryers cook differently. Use a quick read thermometer to ensure you food is thoroughly cooked.