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1
Make the sauce
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2
In a 1- to 2-quart saucepan, whisk together the ketchup, maple syrup, molasses, vinegar, chipotles, Worcestershire sauce, dry mustard, onion powder, and garlic powder. Bring to a boil over medium heat, reduce the heat to low, and simmer gently for 15 minutes to meld the flavors. Set aside.
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3
Make the chicken
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4
In a small bowl, combine the paprika, sugar, garlic powder, onion powder, chipotle powder, 1-1/2 tsp. salt, and 1/2 tsp. pepper. Arrange the chicken on a platter or baking sheet, sprinkle both sides with the spice rub, and pat gently. Cover with plastic wrap and refrigerate for 2 to 3 hours.
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5
Position a rack about 4 inches from the broiler and heat the broiler on high. Line the top rack of a broiler pan with foil and slit or puncture the foil at the openings to allow fat to drain.
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6
Brush both sides of the chicken with oil and arrange skin side down on the pan. Broil for 5 minutes. Flip the chicken with tongs (rearranging them if the broiler heat isn't even) and broil until they're barely pink inside when cut into, 4 to 5 minutes. Brush the chicken with some of the sauce and broil until the sauce begins to caramelize, 1 to 2 minutes. Flip and brush the chicken with more sauce; broil until they're just cooked through (165u00b0F), and the sauce is nicely caramelized, 1 to 2 minutes more. Transfer the chicken to a clean platter and let rest 10 minutes before serving.