Combine all ingredients (except chicken), if mixture is too thick, keep adding hot water until mixture is similar to cream.
Reserve 1/2 cup of marinade mixture for basting while grilling.
Place remaining marinade in zip loc bag, add chicken pieces, squish to combine, marinate for 2-3 hours
Heat grill, lightly oil grates, place chicken on grate and brush with reserved peanutbutter mixture while grilling. Grill until juices run clear.(about 30 min).