01 - Preheat the oven to 400°F (200°C).
02 - Pat chicken thighs thoroughly dry using paper towels. Season all sides evenly with salt and black pepper.
03 - Whisk together the maple syrup, Dijon mustard, gluten-free soy sauce, minced garlic, apple cider vinegar, and smoked paprika in a mixing bowl until smooth and well combined.
04 - Place chicken thighs snugly in a single layer in a large oven-safe skillet or baking dish. Pour the prepared glaze evenly over the chicken, turning each thigh to ensure every piece is generously coated.
05 - Bake uncovered for 30 to 35 minutes, basting the chicken with pan juices every 10 to 15 minutes, until the chicken is deeply golden and the internal temperature registers 165°F (74°C).
06 - For crispier skin, broil the chicken for an additional 2 to 3 minutes, monitoring closely to prevent burning.
07 - Allow the chicken to rest for 5 minutes out of the oven. Sprinkle with chopped fresh parsley just before serving, if desired.