Make a marinade by blending the sugar, vinegar, soy sauce, and chipotle in adobo.
Thoroughly mix the marinade in with your chicken wings and allow to sit, covered, on the countertop for a minimum of 30 minutes and up to 2 hours (a gallon ziploc bag is perfect for this).
Preheat your oven to broil (500°F) with the rack set to the middle position. At the same time, cover a baking sheet with aluminum foil and place a rack on top.
When you are done marinating, position the chicken on the rack spacing each wing about 1/2” apart.
Place the chicken in the oven, check back every 5 minutes or so for signs of burning, you want a little char, but not too much.
After 15 minutes has elapsed, remove the chicken from the oven and move the rack up a position, then close the oven door so that no heat escapes. Flip the chicken and place back in the oven for another 10 minutes.
After 10 minutes, remove and enjoy immediately.