in a large bowl, combine pickle juice and milk (if making a spicy sandwich, add hot sauce as well)
Stab the chicken a few times with a fork to allow the flavors to penetrate the chicken. Add chicken into the bowl, cover and allow to marinate in fridge for at least 30 minutes or all-day
preheat air fryer to 400 degrees
meanwhile, on a small plate, combine flour, sugar and seasonings, stirring together
remove chicken from fridge, add egg to the bowl of chicken (without draining) and stir to combine with the other liquids
remove chicken from the bowl, shaking off the excess liquid
place chicken on the plate of flour, completely coating each side of the chicken in the flour mixture then set aside on a clean plate
spray air fryer with cooking spray then place coated chicken inside. Air fry for 1 minute then spray chicken with cooking spray. Cook for another 4 minutes. Flip chicken, spray with cooking spray and cook for another 5-7 minutes, until fully cooked
skip the air fryer and bake your chicken at 425 degrees for 12-15 minutes, or until thoroughly cooked. (Flipping halfway)