01 - Pat the chicken breasts completely dry with paper towels to ensure proper seasoning adhesion.
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 to distribute spices evenly.
03 - Brush olive oil or melted butter over both sides of each chicken breast. Generously apply the spice mixture, pressing firmly to ensure the rub adheres to the surface.
04 - Heat a large cast-iron skillet over medium-high heat until thoroughly hot, approximately 3 minutes. A properly preheated pan is essential for achieving the characteristic dark crust.
05 - Place chicken breasts in the hot skillet without crowding. Cook undisturbed for 4 to 5 minutes until a deep, dark crust forms. Flip and cook an additional 4 to 5 minutes until internal temperature reaches 165°F.
06 - Transfer chicken to a cutting board and allow to rest for 3 minutes, which helps retain juices. Slice and serve immediately with lemon wedges on the side.