01 - Preheat a large cast-iron skillet over medium-high heat until very hot (about 5 minutes).
02 - Pat chicken breasts dry with paper towels to ensure proper seasoning adhesion.
03 - In a small bowl, combine smoked paprika, garlic powder, onion powder, dried thyme, dried oregano, cayenne pepper, black pepper, and kosher salt.
04 - Brush both sides of the chicken breasts with olive oil or melted butter.
05 - Generously coat each chicken breast on all sides with the spice mixture, pressing gently so the spices adhere evenly.
06 - Place chicken breasts in the hot skillet. Cook undisturbed for 4-5 minutes until a dark, almost black crust forms.
07 - Flip the chicken and cook another 4-5 minutes, or until the internal temperature reaches 165°F and juices run clear.
08 - Remove from heat and let rest for 2-3 minutes to allow juices to redistribute.
09 - Slice and serve hot, garnished with fresh parsley and lemon wedges as desired.