In a small container combine garlic powder, onion powder, cayenne powder, and smoked sweet paprika. Mix well.
In a small bowl, combine whole grain mustard, yellow mustard, and olive oil. Mix well.
Pat dry boneless chicken thighs.
Season boneless chicken thighs with salt, ground black pepper, and the garlic mixture.
Coat both sides of boneless chicken thighs with the mustard mixture. Scrape-off any excess mustard and return to the small bowl.
Marinate chicken for at least 30 minutes.
Gently transfer marinated boneless chicken thighs onto Air Fryer tray, skin side up.
Then slowly insert Air Fryer tray into the pre-heated 380F (193C) middle cooking chamber, near the rotisserie catch. Set timer for 20 minutes.
After 5 minutes, lightly baste chicken with the mustard mixture. Return boneless chicken thighs, skin side down, into the cooking chamber.
No need to wait for the “turn food” reminder provided by the Air Fryer. See tips or notes when closing the door.
Pour honey into the remaining mustard mixture. Mix well.
After 10 minutes, brush both sides of chicken with the honey-mustard mixture. Return to the cooking chamber, skin side up.
For the last 2 minutes, increase the Air Fryer temperature to 390F (199C).
Garnish with fresh parsley. Enjoy.