Pat the chicken dry. Use paper towels to remove surface moisture.
Dry skin equals better browning and crispiness.
Make the marinade. In a bowl, whisk together five-spice powder, salt, pepper, soy sauce, honey, rice vinegar, garlic, ginger, and oil.
Coat the chicken. Add the thighs and toss until every surface is evenly covered. For best flavor, marinate 30 minutes at room temperature or up to 12 hours in the fridge.
Preheat the oven to 425°F (220°C). Line a sheet pan with foil and set a wire rack on top, if you have one. The rack helps render fat and keeps the skin crisp.
Arrange the thighs. Place them skin-side up on the rack or directly on the pan.
Leave a little space between pieces.
Roast until crispy and cooked through. Bake 30–35 minutes, or until the internal temperature hits 175–185°F and the skin is deeply browned. Thighs are best a bit higher than 165°F for tenderness.
Optional broil for extra crisp. Broil 1–2 minutes at the end, watching closely to prevent burning.
Rest and finish. Let the chicken rest 5 minutes. Garnish with scallions, sesame seeds, and a squeeze of lime if you like.
Serve. Pair with rice and greens for an easy, balanced plate.
Spoon any pan juices over the top.