Place the chicken breast in a bowl and cover with buttermilk; let marinate for at least 20 minutes in the refrigerator.
In a shallow dish, combine 2 tablespoons of arrowroot starch, sea salt, black pepper, garlic powder, onion powder, and paprika.
Remove the chicken from the buttermilk, letting excess liquid drip off, then dredge thoroughly in the seasoned starch mixture.
Lightly coat the chicken with avocado oil and air fry at 375°F for 15-18 minutes, flipping halfway through, until the exterior is golden and crisp.
While the chicken cooks, melt the ghee in a small saucepan over medium heat.
Whisk in the remaining 1 teaspoon of arrowroot starch to form a smooth paste.
Slowly pour in the almond milk while whisking constantly to prevent lumps, then stir in the dried thyme.
Simmer the sauce for 3-5 minutes until it reaches a velvety gravy consistency.
Serve the crispy chicken immediately, smothered in the warm cream gravy.