Combine everything but the chicken in a small bowl. Whisk to dissolve brown sugar. Place marinade and chicken in a zip-lock bag. Place in the fridge for a minimum of 4 hours, or overnight.
Preheat a grill (or an indoor grill pan or broiler). 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.