Place the chicken breast in a shallow bowl and pour the buttermilk over it, ensuring it is fully coated. Marinate for at least 20 minutes.
In a small plate, whisk together 2 tablespoons of whole wheat flour, sea salt, black pepper, garlic powder, onion powder, and smoked paprika.
Remove the chicken from the buttermilk, letting the excess drip off, and dredge it thoroughly in the seasoned flour mixture.
Heat the avocado oil in a non-stick skillet over medium heat. Once hot, add the chicken and cook for 5-6 minutes per side until golden brown and the internal temperature reaches 165°F.
Remove the chicken from the skillet and set aside to rest. Do not wipe out the pan.
In the same skillet, whisk in the remaining 1 tablespoon of flour into the residual oil for 1 minute to create a roux.
Slowly whisk in the almond milk and dried thyme. Simmer for 2-3 minutes until the gravy thickens into a creamy consistency.
Serve the chicken hot, generously smothered with the herb gravy.