01 - Preheat the oven to 425°F (220°C). Line a rimmed baking sheet with parchment paper or lightly coat with nonstick spray.
02 - Pat each chicken breast thoroughly dry on both sides using paper towels to promote even browning and better seasoning adhesion.
03 - In a small mixing bowl, combine the olive oil, salt, black pepper, garlic powder, smoked paprika, dried thyme, and onion powder. Stir until a uniform paste forms.
04 - Rub the seasoning mixture evenly over both sides of each chicken breast, ensuring complete and uniform coverage.
05 - Place the seasoned chicken breasts onto the prepared baking sheet, leaving at least 1 inch of space between each piece to allow for proper air circulation and even cooking.
06 - Bake on the center rack for 20–25 minutes, or until the thickest part of each breast registers 165°F (74°C) on an instant-read thermometer and juices run clear when pierced.
07 - Remove from the oven and let the chicken rest on the baking sheet for 5 minutes to allow the juices to redistribute throughout the meat.
08 - Transfer to a serving platter, garnish with freshly chopped parsley, and accompany with lemon wedges. Serve immediately alongside roasted vegetables, mashed potatoes, or a crisp green salad.