01 -
Combine light brown sugar, garlic powder, onion powder, smoked paprika, salt, black pepper, and ground mustard in a small bowl. Stir until evenly mixed.
02 -
Place chicken legs in a large bowl and sprinkle the dry rub evenly over them. Toss gently to coat. Cover with plastic wrap and refrigerate for at least 2 hours. If short on time, proceed without marinating.
03 -
Mix barbecue sauce with water in a separate bowl until combined. Set aside.
04 -
Clean the grill grates thoroughly and lightly oil them. Preheat the grill to medium heat, approximately 350°F (177°C).
05 -
Place the chicken legs on the grill, close the lid, and cook for 15 to 20 minutes, turning every few minutes until the internal temperature reaches between 130°F and 140°F.
06 -
Baste the chicken legs on both sides with the barbecue sauce mixture. Continue grilling, turning and basting every minute, until the internal temperature reaches at least 165°F, approximately 10 more minutes. For tender, fall-off-the-bone texture, cook until 180–190°F if desired.
07 -
Remove chicken from grill once the target temperature is reached. Let rest briefly before serving to allow juices to redistribute.