Put all ingredients except chicken in measuring cup, or deli container and shake or mix well to combine - set aside.
Flatten chicken breasts to an even thickness, and place in a ziplock bag - add about ¾ of the marinade.
Mush around to ensure chicken is well covered, seal the bag and refrigerate a couple hours.
Remove from fridge at least 30 minutes before cooking.
Grill on a very hot grill, turning often and brushing with reserved marinade once chicken is grilled on both sides - cook until chicken hits 165 degrees.
Remove, brush again and use.
