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 large resealable plastic bag or shallow dish. Reserve 1/2 cup of the glaze mixture and set aside for basting later. Pour the remaining marinade over the chicken, seal the bag or cover the dish, and refrigerate for at least 1 hour or up to 8 hours.
03 - Preheat your grill to medium-high heat, approximately 375°F to 400°F. Lightly oil the grill grates to prevent the chicken from sticking.
04 - Remove the chicken from the marinade and discard the used marinade. Place the chicken breasts on the grill, close the lid, and cook for 5 to 6 minutes per side. Baste occasionally with the reserved Coca Cola glaze during grilling. Cook until the internal temperature reaches 165°F as measured with a meat thermometer.
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.