Prep the oven and pan. Preheat to 425°F (220°C). Line a sheet pan with foil or use a large oven-safe skillet. Set a wire rack on the pan if you want extra-crispy skin.

Pat the chicken dry. Use paper towels to remove surface moisture from the thighs. Dry skin = crisp skin.

Mix the seasoning paste. In a bowl, combine 3 tablespoons olive oil, 1 tablespoon melted butter (optional), minced garlic, 1 tablespoon chopped rosemary, 1 tablespoon chopped thyme, 2 tablespoons chopped parsley, 1 teaspoon lemon zest, 1 teaspoon paprika, 1 teaspoon onion powder, 1 teaspoon kosher salt, 1/2 teaspoon black pepper, and a pinch of red pepper flakes if you like heat.

Season under and over the skin. Gently loosen the skin on each thigh with your fingers and rub some of the paste directly onto the meat. Then rub more paste on top of the skin. This layers flavor and helps browning.

Arrange for airflow. Place the thighs skin-side up on the rack or pan, leaving space between them. Crowding traps steam and softens the skin.

Bake until crispy and cooked through. Roast for 35–45 minutes, depending on size. You want an internal temp of 175°F–190°F for thighs—this higher range makes them tender and juicy. The skin should be deep golden and crisp.

Finish with lemon. Let the chicken rest 5 minutes. Squeeze over a little lemon juice for brightness. Sprinkle with extra parsley if you have it.

Optional pan sauce. Set the pan over medium heat. Add a splash of white wine or chicken stock to the drippings, scrape up the browned bits, and simmer 2–3 minutes. Whisk in a small knob of butter and a squeeze of lemon. Spoon over the chicken.

Serve. Pair with roasted potatoes, steamed green beans, or a simple salad. The garlicky drippings are great over rice or couscous.