Combine all of the marinade ingredients in a glass measuring cup or bowl and whisk together until combined.
Place the chicken breasts and marinade into a freezer bag. Seal the bag, pressing the air out as you do. Massage the marinade into the chicken then refrigerate it for at least an hour or overnight.
Preheat grill to 400° F. Oil the grates and place the chicken on them. Grill for 6-7 minutes then flip and grill another 5-6 minutes or until the internal temperature is 165° F. Remove the chicken from the grill and let it rest for 5-10 minutes before slicing it.
Notes
The grilled chicken will keep in the fridge for up to 5 days. Freeze the chicken for up to 3 months.