Start by preheating your oven to 400°F (200°C). Place your cast iron skillet over medium-high heat so it gets hot before the chicken touches it. A properly heated skillet is the secret to achieving that golden, crispy skin without sticking.
Pat the chicken thighs dry with paper towels to remove excess moisture. Drizzle olive oil over them, then mix oregano, basil, onion powder, garlic powder, salt, pepper, and lemon juice in a small bowl. Rub the seasoning mixture thoroughly over each thigh so every piece is evenly coated.
Place the thighs skin-side down in the hot skillet. Let them cook undisturbed for 1–2 minutes to allow the skin to crisp and brown. Flip them carefully and cook for another couple of minutes to lightly brown the other side.
Move the skillet directly into the preheated oven. Roast the chicken for about 30 minutes, or until the internal temperature reaches 165°F. The oven finishes cooking the meat while keeping the outside crispy.
Remove the skillet from the oven and allow the chicken to rest for 5 minutes. Resting helps redistribute the juices so the meat stays tender. Serve warm and enjoy that perfect crispy skin.