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 dissolves.
02 - Place the chicken breasts in a resealable plastic bag or shallow dish. Reserve 1/2 cup of the marinade mixture for basting during grilling, 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 generously to prevent 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 down, basting occasionally with the reserved Coca-Cola glaze, until the internal temperature reaches 165°F at the thickest part.
05 - Transfer the chicken to a cutting board and let it rest for 5 minutes. Garnish with chopped fresh parsley and serve alongside grilled vegetables, corn on the cob, or a light summer salad.