Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness.
In a shallow bowl, submerge the chicken in the buttermilk and let it soak for 10 minutes.
In a separate shallow dish, whisk together the almond flour, 1 tablespoon of arrowroot starch, garlic powder, onion powder, sea salt, and black pepper.
Remove the chicken from the buttermilk and dredge it through the flour mixture, pressing firmly to ensure a thick, even coating.
Heat the avocado oil in a large skillet over medium heat. Once hot, add the chicken and cook for 5-6 minutes per side until the crust is golden brown and the internal temperature reaches 165 degrees.
Remove the chicken from the skillet and set aside on a plate.
In the same skillet, whisk together the chicken bone broth, almond milk, dried thyme, and the remaining 1 teaspoon of arrowroot starch.
Simmer the sauce over medium-low heat for 2-3 minutes, whisking constantly until it thickens into a creamy gravy.
Pour the gravy over the crispy chicken and serve immediately.