Prep the chicken: If using whole breasts, slice them horizontally into thin cutlets about 1/2 inch thick. Pat dry with paper towels.
This helps the coating stick and ensures even cooking.
Preheat the air fryer: Set it to 400°F (200°C) for 3–5 minutes. A hot basket prevents sticking and kick-starts crisping.
Mix the wet layer: In a small bowl, stir together mayonnaise and Dijon. Brush a thin layer on both sides of each cutlet.
You just need enough to help the crumbs adhere.
Make the crust: In a shallow dish, combine Parmesan, panko, garlic powder, onion powder, smoked paprika, Italian seasoning, salt, and pepper. Mix well so the flavors are even.
Coat the chicken: Press each cutlet into the Parmesan crumb mixture, coating both sides and gently pressing to help it cling. Shake off any loose crumbs.
Oil the basket: Lightly spray the air fryer basket with oil to reduce sticking.
Arrange the cutlets in a single layer with space around them. Work in batches if needed.
Spritz the tops: Lightly spray the coated chicken. This helps the crust turn golden and crisp.
Air fry: Cook at 400°F (200°C) for 6–8 minutes.
Flip, spray again, and cook another 4–6 minutes. The chicken is done when the crust is deep golden and the internal temperature reaches 165°F (74°C).
Rest: Let the chicken rest 3 minutes so the juices settle and the crust firms up.
Serve: Squeeze lemon over the top and sprinkle with parsley. Add your favorite sides—think arugula salad, garlicky green beans, or buttered noodles.