Preheat the oven to 400°F. Line a rimmed baking sheet with foil and set a wire rack on top.
Whisk soy sauce, ketchup, honey, brown sugar, vinegar, water, oil, garlic, onion powder, ginger, black pepper, and red pepper flakes in a bowl.
Pat chicken dry. Toss with about half of the sauce to coat well.
Arrange chicken on the rack, skin side up. Reserve the remaining sauce for basting.
Bake for 20 minutes. Baste the tops with some of the reserved sauce.
Flip the pieces and bake 15 minutes more. Brush with more sauce.
Continue baking 10–15 minutes until sticky, deeply browned, and at least 175°F inside. Broil 1–2 minutes if you want extra char.
Rest 5 minutes. Toss with pan juices, then finish with sesame seeds and green onions.
Notes
Variation: Add 1–2 teaspoons sriracha to the sauce for a spicy kick, or swap half the honey for orange marmalade for a citrusy glaze. Serve with steamed rice and a crisp slaw to balance the sweetness. Leftovers keep 3–4 days refrigerated; reheat at 350°F until warm or enjoy cold.This recipe is an original creation inspired by classic Caramelized Baked Chicken Legs or Wings flavors. All ingredient ratios and instructions are independently developed.