Preheat and prep: Heat your oven to 425°F (220°C). Line a rimmed baking sheet with foil or parchment for easy cleanup.
Set a wire rack on top if you have one to help the thighs crisp.
Mix the spice rub: In a small bowl, combine salt, pepper, smoked paprika, garlic powder, onion powder, cumin, and cayenne if using.
Pat dry and season: Pat the chicken thighs dry with paper towels. Rub them with olive oil, then sprinkle the spice mix evenly on all sides. Place them skin-side up on the prepared pan.
Start baking: Bake for 20 minutes, skin-side up.
This jumpstarts rendering the fat and crisping the skin.
Stir the sauce: While the chicken bakes, whisk together ketchup, apple cider vinegar, molasses (or maple), Worcestershire, Dijon, smoked paprika, garlic powder, and 1 tablespoon water. Add another tablespoon of water if you prefer a thinner glaze.
Glaze and continue baking: Remove the pan after 20 minutes. Brush a light layer of the BBQ sauce over the thighs.
Return to the oven and bake another 12–15 minutes.
Final glaze and broil: Brush on a second coat of sauce. Switch the oven to broil on high and broil for 2–3 minutes to caramelize. Watch closely—sauce can go from perfect to burnt quickly.
Check doneness: The chicken is done when it reaches 175–185°F in the thickest part and the juices run clear.
Thighs are best a bit higher than 165°F for maximum tenderness.
Rest and serve: Let the thighs rest 5 minutes. Garnish with chopped parsley or green onions. Serve with extra sauce on the side if you like.