Place the chicken breast in a shallow bowl and pour the buttermilk over it, ensuring the meat is fully submerged.
Marinate the chicken in the refrigerator for at least 30 minutes to allow the buttermilk to tenderize the protein.
In a separate wide dish, whisk together the almond flour, arrowroot powder, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Remove the chicken from the buttermilk, letting the excess liquid drip off, then dredge it thoroughly in the seasoned flour mixture.
Heat the avocado oil in a large skillet over medium heat until it begins to shimmer.
Carefully place the chicken in the skillet and cook for 5 to 7 minutes per side until the crust is golden brown and the internal temperature reaches 165 degrees Fahrenheit.
Transfer the chicken to a wire rack for 2 minutes to rest, which helps maintain the crispy exterior before serving.