Remove chicken breasts from the refrigerator and let sit at room temperature for 15 minutes. Place on a cutting board, cover with a large sheet of plastic wrap (optional to keep things tidier) and gently pound into an even thickness (about 1/2 inch).
With a paper towel, pat dry, then season with 1/2 teaspoon kosher salt and 1/4 teaspoon black pepper. Set aside.
In a wide, shallow dish such as a pie plate, stir together the flour, paprika, parsley, garlic powder, onion powder, cayenne, and remaining 1/2 teaspoon salt and 1/4 teaspoon black pepper.
Working one at a time, dredge each chicken breast in the flour mixture, shaking off any excess. Transfer to a clean plate.
Heat the oil in a large, sturdy skillet (such as cast iron or stainless steel) over medium-high heat. Once it is hot and shining, add the chicken, presentation (smooth) side down.
Cook 4 minutes on the first side without disturbing the chicken, until it is deeply golden and releases easily from the pan. Flip and cook an additional 3 to 5 minutes on the other side, until the chicken reaches 155 degrees on an instant read thermometer (chicken is considered cooked at 165 degrees F, but will continue cooking as it rests).
Transfer the cooked chicken to a plate or cutting board. Cover and let rest for 10 minutes. Enjoy warm with a squeeze of lemon juice and sprinkle of herbs.
TO STORE: Refrigerate chicken in an airtight storage container for up to 4 days.
TO REHEAT: Gently rewarm leftovers in a skillet on the stovetop over medium-low heat or in the microwave.
TO FREEZE: Freeze chicken in an airtight, freezer-safe storage container for up to 3 months. Let thaw overnight in the refrigerator before reheating.