Preheat your oven to 400°F and line a baking sheet with parchment paper.
Place the chicken breast in a shallow bowl with the buttermilk and let it soak for 10 minutes.
In a separate shallow dish, whisk together the almond flour, garlic powder, onion powder, smoked paprika, sea salt, and black pepper.
Remove the chicken from the buttermilk, allowing excess to drip off, then dredge in the almond flour mixture until evenly coated.
Place the chicken on the prepared baking sheet and lightly mist the top with avocado oil.
Bake for 20-25 minutes, flipping halfway through, until the coating is golden and the internal temperature reaches 165°F.
While the chicken bakes, combine the chicken bone broth and arrowroot powder in a small saucepan over medium heat, whisking constantly until the mixture thickens into a gravy.
Remove the gravy from the heat and stir in the Greek yogurt until completely smooth and creamy.
Slice the crispy chicken and serve immediately with the warm gravy drizzled over the top.