Prep the chicken: Pat the chicken thighs very dry with paper towels. Dry skin is key to crisping, so don’t skip this step.
Make the seasoning mix: In a small bowl, combine lemon zest, black pepper, salt, garlic powder, onion powder, and smoked paprika.
Stir in the olive oil and 1 tablespoon of lemon juice to form a loose paste.
Season thoroughly: Rub the paste all over the thighs, lifting the skin gently to get some seasoning underneath. Place thighs skin side up on a parchment-lined sheet pan or a lightly oiled baking rack set over a sheet pan.
Roast: Preheat the oven to 425°F (220°C). Roast for 30–38 minutes, until the skin is deeply golden and an instant-read thermometer in the thickest part reads 175–185°F.
Dark meat shines at a slightly higher finish temp because it gets more tender.
Optional crisp boost: For extra-crispy skin, broil on high for 1–2 minutes at the end, watching closely to avoid burning.
Finish with lemon: Let rest 5 minutes. Squeeze the remaining lemon juice over the thighs right before serving and garnish with chopped parsley.
Air fryer method: Cook at 380°F for 18–22 minutes, flipping at 12 minutes, until 175–185°F internal and skin is crisp.
Skillet-to-oven method: Sear skin side down in a hot oven-safe skillet with a little oil for 5–7 minutes until browned. Flip, then bake at 400°F for 20–25 minutes until done.