Place the chicken breast in a shallow bowl and pour the buttermilk over it, ensuring it is fully submerged; marinate for at least 30 minutes in the refrigerator.
In a separate shallow dish, whisk together the 3 tablespoons of whole wheat flour, garlic powder, onion powder, smoked paprika, sea salt, and black pepper.
Remove the chicken from the buttermilk, letting excess drip off, then dredge it thoroughly in the seasoned flour mixture until evenly coated.
Heat the avocado oil in a medium skillet over medium-high 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 Fahrenheit.
Remove the chicken from the skillet and set aside to rest on a plate.
In the same skillet, melt the grass-fed butter over medium heat, then whisk in the remaining teaspoon of whole wheat flour to create a roux.
Slowly whisk in the almond milk and dried thyme, simmering for 2-3 minutes until the gravy has thickened to a velvety consistency.
Pour the warm gravy over the chicken breast and serve immediately.