Slice the chicken breast into even strips or thin cutlets to ensure quick and uniform cooking.
Place the chicken in a shallow bowl and pour the buttermilk over it, allowing it to soak for at least 15 minutes.
In a separate wide dish, whisk together the whole wheat flour, smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Remove each piece of chicken from the buttermilk, letting the excess liquid drip off, then press firmly into the flour mixture to coat all sides.
Heat the avocado oil in a large non-stick skillet over medium-high heat until shimmering.
Carefully place the coated chicken in the skillet and cook for 4-5 minutes per side until the exterior is deep golden brown and the internal temperature reaches 165°F.
While the chicken is frying, steam the broccoli florets in a small amount of water until they are bright green and tender-crisp.
Transfer the chicken to a wire rack for one minute to maintain crispness, then serve immediately alongside the steamed broccoli.