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