Brush this glaze on the chicken during the last 10 minutes of cooking. Coat one side, cook for 5 minutes, flip, brush the other side, cook another 5 minutes, and flip once more to heat the glaze. You can use any classic barbecue sauce the same way.Yields about 2/3 cup; enough for 1 chicken.
Combine the ingredients in a small saucepan over medium heat, whisking to combine. Bring to a simmer and cook, stirring occasionally, until thickened and reduced by about one-third, about 10 minutes. Let cool.
This glaze can be made ahead and kept refrigerated for days.