01 - Preheat oven to 425°F. Line a rimmed baking sheet with parchment paper or lightly grease with nonstick spray.
02 - Pat the chicken breasts thoroughly dry on both sides using paper towels. For even cooking, pound thicker portions to a uniform thickness of about 3/4 inch.
03 - In a small mixing bowl, combine the olive oil, salt, black pepper, garlic powder, paprika, dried thyme, and onion powder until a smooth paste forms.
04 - Rub the seasoning mixture evenly over both sides of each chicken breast, ensuring full coverage.
05 - Place the seasoned chicken breasts on the prepared baking sheet, leaving at least 1 inch of space between each piece for proper air circulation.
06 - Bake on the center rack for 20 to 25 minutes, until the internal temperature at the thickest part reaches 165°F when checked with an instant-read thermometer and juices run clear.
07 - Remove from the oven and let the chicken rest for 5 minutes on the baking sheet. This allows the juices to redistribute for maximum tenderness.
08 - Transfer to a serving platter, garnish with chopped fresh parsley, and accompany with lemon wedges. Serve alongside roasted vegetables, mashed potatoes, or a crisp green salad.