In a mixing bowl, combine the honey, mayonnaise, French mustard, capers, chopped parsley, lemon juice, minced garlic, and olive oil. Whisk everything together until the mixture is smooth and well combined.
Place the chicken pieces in a large zip-top bag or a shallow dish. Pour the marinade over the chicken, ensuring that each piece is well-coated. Seal the bag or cover the dish and refrigerate for at least 1 hour, or up to 8 hours for maximum flavor.
While the chicken is marinating, preheat your grill to medium-high heat. If you’re using a charcoal grill, make sure the coals are glowing and covered with ash.
Remove the chicken from the marinade, allowing any excess to drip off. Place the chicken on the grill, skin side down if using skin-on pieces. Grill for about 5-7 minutes, then flip and continue to grill for another 5-7 minutes, or until the internal temperature reaches 165°F (75°C).
Once the chicken is cooked through, remove it from the grill and let it rest for about 5 minutes. This allows the juices to redistribute, ensuring a tender and juicy bite. Serve your BBQ marinated chicken with your favorite summer sides and enjoy!