Pat chicken breasts or thighs dry
Mix paprika, garlic powder, onion powder, dried thyme, dried oregano, cayenne, salt, and black pepper
Coat the chicken evenly with melted butter or oil
Rub the spice mixture all over the chicken
Heat a cast-iron skillet over medium-high to high heat
Add a small amount of oil to the skillet
Place the chicken in the hot skillet
Cook until deeply browned on the first side
Flip and cook the other side until blackened and cooked through
Reduce heat if needed to prevent burning
Check that the internal temperature reaches 165°F
Rest the chicken for a few minutes before serving