01 - Pat the chicken breasts completely dry with paper towels to ensure proper seasoning adhesion and crust formation.
02 - Combine smoked paprika, garlic powder, onion powder, dried thyme, dried oregano, cayenne pepper, black pepper, and kosher salt in a small bowl. Mix thoroughly until evenly blended.
03 - Brush both sides of each chicken breast with olive oil or melted butter, then generously rub the spice mixture over the surface, pressing firmly to ensure the seasoning adheres properly.
04 - Place a large cast-iron skillet over medium-high heat and allow it to become very hot, approximately 3 minutes. The pan must be properly preheated to achieve the characteristic blackened crust.
05 - Arrange the seasoned chicken breasts in the hot skillet without overcrowding. Cook undisturbed for 4 to 5 minutes until a dark, charred crust forms on the first side.
06 - Flip the chicken breasts and continue cooking for an additional 4 to 5 minutes. The chicken is done when it reaches an internal temperature of 165°F and the juices run clear.
07 - Transfer the chicken to a cutting board and let rest for 3 minutes to allow the juices to redistribute. Serve immediately with lemon wedges on the side.