Slice the chicken breast into even strips or medallions to ensure quick and uniform cooking.
Place the chicken in a shallow bowl and pour the buttermilk over it, ensuring every piece is submerged, and let it marinate for at least 15 minutes.
In a separate wide dish, whisk together the almond flour, arrowroot powder, smoked paprika, garlic powder, sea salt, and black pepper.
Remove each piece of chicken from the buttermilk, letting the excess drip off, then dredge thoroughly in the flour mixture until well-coated.
Heat the avocado oil in a large non-stick skillet over medium-high heat until it shimmers.
Carefully place the chicken in the hot skillet and cook for 4-5 minutes per side until the crust is deeply golden and the internal temperature reaches 165 degrees Fahrenheit.
Transfer the chicken to a wire rack for one minute to maintain the crispiness before serving warm.