Whisk all ingredients for the marinade together in a bowl and pour it over the chicken in the bag.
Let all the air out and seal the bag tight. Place it in to a clean mixing bowl or on a large plate and place it in the refrigerator to marinate.
Let chicken marinate overnight.
Grilling Chicken:
Start the coals and build a two-zone fire when coals are ready. (Or set your gas grill to medium.)
Close the lid and let the grill preheat for about 10 minutes. Make sure the grill grate is clean and seasoned.
Cook chicken breasts over direct heat for 6-8 minutes per side. Exact time will depend on the size of each breast. Cook chicken until internal temperature of the thickest part reaches 165°.