01 - Preheat your oven to 425°F. Line a baking sheet with parchment paper or foil for easy cleanup.
02 - Pat the chicken breasts dry with paper towels. Place them in a large bowl or zip-top bag.
03 - Drizzle olive oil over the chicken and toss to coat evenly.
04 - In a small bowl, mix together salt, pepper, garlic powder, smoked paprika, onion powder, thyme, and cayenne (if using). Sprinkle the seasoning mix evenly over both sides of the chicken breasts and rub in well.
05 - Arrange the chicken breasts in a single layer on the prepared baking sheet, spacing them slightly apart.
06 - Bake for 18–25 minutes, depending on thickness, until the internal temperature reaches 165°F.
07 - Remove from oven, cover loosely with foil, and let rest for 5 minutes before slicing.
08 - Garnish with chopped parsley and serve with lemon wedges if desired.