Prep the chicken. Pat the chicken breasts dry with paper towels.
If they’re very thick, slice them in half horizontally to make cutlets or gently pound to an even 3/4-inch thickness. Even thickness means even cooking.
Preheat the air fryer. Set to 380°F (193°C) for 3–5 minutes. A preheated basket helps the coating crisp up.
Mix the seasoning. In a bowl, combine Parmesan, minced garlic (or garlic powder), Italian seasoning, paprika, salt, pepper, and red pepper flakes if using.
Coat the chicken. Drizzle chicken with olive oil and rub to coat.
Press each piece into the Parmesan mixture on both sides, ensuring a generous, even layer.
Prepare the basket. Lightly spray the air fryer basket with cooking spray to prevent sticking.
Air fry. Arrange chicken in a single layer with space between pieces. Cook at 380°F (193°C) for 8–10 minutes, flip, then cook 5–7 minutes more. Target internal temperature: 165°F (74°C).
Rest briefly. Remove and let sit 3–5 minutes. This helps the juices settle and keeps the chicken tender.
Finish and serve. Sprinkle with extra Parmesan, chopped parsley, and a squeeze of lemon if you like.
Serve with steamed greens, roasted potatoes, or a light arugula salad.