Slice the chicken breast into even strips or keep whole for a larger cutlet.
Place the chicken in a bowl and pour the buttermilk over it, ensuring all pieces are submerged, and marinate for at least 30 minutes.
In a shallow dish, whisk together the almond flour, arrowroot powder, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Remove each piece of chicken from the buttermilk, letting the excess drip off, and dredge thoroughly in the flour mixture, pressing to adhere.
Preheat your air fryer to 375°F and lightly coat the basket with half of the avocado oil.
Arrange the chicken in a single layer in the basket and spray the tops with the remaining avocado oil.
Air fry for 12 to 15 minutes, flipping halfway through, until the crust is golden brown and the internal temperature reaches 165°F.