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, thyme, oregano, cayenne pepper, black pepper, and salt in a small bowl. Mix thoroughly to incorporate all spices evenly.
03 - Brush both sides of each chicken breast with olive oil or melted butter. Generously rub the spice mixture over the entire 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 sufficiently hot to create the signature blackened crust.
05 - Carefully place the seasoned chicken breasts in the hot skillet. Do not move or disturb the chicken for 4 to 5 minutes to allow a dark, flavorful crust to develop on the first side.
06 - Flip each chicken breast and continue cooking for another 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 from the skillet to a clean plate or cutting board. Allow the meat to rest for at least 3 minutes before slicing or serving to ensure maximum juiciness.
08 - Slice the rested chicken breasts against the grain if desired. Serve immediately with fresh lemon wedges for squeezing over the meat.