01 - In a medium bowl, combine the Coca Cola, ketchup, soy sauce, apple cider vinegar, brown sugar, minced garlic, smoked paprika, black pepper, and salt. Whisk until fully blended and the sugar has dissolved.
02 - Place the chicken breasts in a resealable plastic bag or shallow dish. Reserve 1/2 cup of the marinade for basting later, then pour the remaining marinade over the chicken. Seal and refrigerate for at least 1 hour, or up to 8 hours for deeper flavor.
03 - Preheat your grill to medium-high heat, approximately 375°F to 400°F. Oil the grill grates thoroughly to prevent the chicken from sticking.
04 - Remove the chicken from the marinade and discard the used marinade. Place the chicken on the grill and cook for 5 to 6 minutes per side with the lid closed, basting occasionally with the reserved Coca Cola glaze, until the internal temperature reaches 165°F.
05 - Transfer the chicken to a cutting board and let it rest for 5 minutes to allow the juices to redistribute. Garnish with chopped fresh parsley and serve immediately.