Pound chicken breasts to make tender. Set aside.
In a gallon sized Ziploc bag, combine all other ingredients. Once blended, remove a bit to baste the chicken with later on the bbq.
Place chicken into the bag and let marinate in the fridge for several hours if you have time.
Grill on bbq until internal temp 165. (baste with the reserved marinade)
Remove and cover with foil to rest a few minutes before slicing.