Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness.
Submerge the chicken in buttermilk in a shallow bowl and marinate in the refrigerator for at least 30 minutes.
In a separate shallow dish, whisk together the whole wheat flour, sea salt, black pepper, garlic powder, onion powder, and smoked paprika.
Remove the chicken from the buttermilk, allowing the excess to drip off, then dredge it thoroughly in the seasoned flour mixture until fully coated.
Heat the avocado oil in a medium skillet over medium heat until shimmering.
Carefully place the chicken in the skillet and fry for 5-6 minutes per side until the exterior is golden brown and the internal temperature reaches 165 degrees Fahrenheit.
Remove the chicken from the pan and set it aside to rest on a wire rack.
In the same skillet, whisk together the almond milk, bone broth, and arrowroot powder, scraping up any browned bits from the bottom of the pan.
Simmer the sauce for 2-3 minutes until it thickens into a smooth gravy, then pour over the chicken and serve immediately.