Preheat the oven to 425°F (220°C). A hot oven helps you get crisp, browned skin and juicy meat. Line a baking sheet with foil and place a wire rack on top if you have one.
The rack helps the chicken cook evenly.
Pat the chicken dry. Use paper towels to remove excess moisture. Dry chicken browns better, and the seasoning sticks more evenly.
Mix the seasoning. In a small bowl, combine salt, pepper, garlic powder, onion powder, paprika, thyme, and chili powder if using. Zest the lemon right into the mix for bright flavor.
Coat the chicken. Drizzle the chicken with olive oil and rub it all over.
Sprinkle the seasoning blend on every side, pressing gently so it adheres. For bone-in breasts, tuck a bit of seasoning under the skin if possible.
Arrange on the rack or pan. Place pieces skin-side up with a little space between them. Crowding leads to steaming instead of browning.
Bake until done. Cook 30–40 minutes for thighs and drumsticks, 35–45 minutes for bone-in breasts, and 18–25 minutes for boneless breasts. Target an internal temperature of 165°F (74°C) at the thickest point without touching bone.
Broil for extra crispiness (optional). If the skin needs more color, broil for 2–3 minutes.
Watch closely to avoid burning.
Rest before serving. Let the chicken rest for 5–10 minutes. This keeps the juices inside and makes each piece tender.
Finish and serve. Squeeze fresh lemon over the top and sprinkle chopped parsley. Serve with roasted vegetables, rice, or a simple salad.