Combine everything but the chicken in a small bowl. Whisk to dissolve brown sugar
Reserve a couple of spoonfuls of the marinade in a small bowl and place the rest, with the chicken, in a zip-lock bag.
You will use the reserved marinade to baste the chicken with the last five minutes of cooking
Refrigerate for a minimum of 4 hours, but overnight is best
Preheat a grill (or an indoor grill pan or broiler) or preheat oven to 350 degrees F.
Spray cooking surface with cooking spray and place chicken on it to cook
Cook for 5-10 minutes on each side depending on the thickness
Brush with reserved marinade the last few minutes of cooking or grilling.