01 - Set oven temperature to 400°F (200°C); allow to heat fully before cooking.
02 - Pat chicken thighs dry with paper towels. Season both sides evenly with salt and black pepper.
03 - In a mixing bowl, thoroughly whisk together maple syrup, Dijon mustard, soy sauce, minced garlic, apple cider vinegar, and smoked paprika until well blended.
04 - Place chicken thighs skin-side up in a single layer in a large oven-safe skillet or baking dish.
05 - Pour the prepared glaze evenly over chicken, turning each piece as needed to ensure thorough coating.
06 - Transfer dish to oven. Bake uncovered for 30 to 35 minutes, basting every 10 to 15 minutes with pan juices, until chicken is deeply golden and fully cooked with an internal temperature of 165°F (74°C).
07 - If desired, broil chicken for 2 to 3 minutes at the end of baking for a crispier skin.
08 - Remove chicken from oven and let rest 5 minutes. Sprinkle with chopped fresh parsley before serving.