Prepare the dry rub: In a small bowl, combine the smoked paprika, garlic powder, onion powder, cumin, cayenne (if using), salt, and black pepper. The mix should smell warm and earthy, with a hint of sweetness from the paprika.

Season the chicken: Pat the drumsticks completely dry with kitchen paper. This is crucial—any moisture on the skin will prevent the rub from sticking and create steam instead of a sear. Drizzle with olive oil and rub it all over the drumsticks. Sprinkle the dry rub generously over the chicken, using your hands to massage it into every crevice. You should see a rich, reddish-brown coating clinging to the meat. Cover and refrigerate for at least 2 hours, or overnight for deeper flavour.

Make the barbecue sauce: While the chicken marinates, whisk together the ketchup, apple cider vinegar, brown sugar, Worcestershire sauce, and mustard powder in a small saucepan. Bring to a gentle simmer over medium heat. You'll see small bubbles form around the edge of the pan, and the aroma will turn from sharp vinegar to a sweet, tangy fragrance. Let it cook for 10 minutes, stirring occasionally, until it thickens to the consistency of a loose jam. Set aside to cool.

Preheat the grill: Heat your grill to medium-high heat, aiming for about 200°C (400°F). If using a charcoal grill, the coals should be ash-covered and glowing. For a gas grill, you should feel a strong, steady heat when you hold your hand 15 cm above the grates for just 2-3 seconds. Clean the grates thoroughly and oil them with a paper towel dipped in vegetable oil to prevent sticking.

Grill the drumsticks: Place the drumsticks on the hottest part of the grill. Listen for the immediate, satisfying sizzle as they hit the metal. Cook for 5-7 minutes without moving them. You'll see the edges begin to char and the skin will tighten. Using tongs, turn the drumsticks. They should release easily from the grates—if they stick, they're not ready to flip. Continue turning every 4-5 minutes, until all sides are deeply browned and charred in spots, about 20 minutes total.

Glaze and finish: Once the drumsticks are cooked through (an internal temperature of 74°C/165°F when tested with a meat thermometer inserted into the thickest part without touching the bone), start basting. Brush a generous layer of your homemade barbecue sauce onto each drumstick. As you brush, you'll see the sauce immediately bubble and caramelize against the hot meat. Turn and baste the other side, cooking for another 2-3 minutes per side. The sauce will become sticky and tacky, with a deep, glossy finish. My husband, who's usually picky, asked for seconds the first time I made these!

Rest and serve: Transfer the grilled drumsticks to a clean platter and let them rest for 5 minutes. This allows the juices to redistribute, ensuring every bite is moist. The skin will be crisp and the meat will pull away easily from the bone. Serve immediately with extra sauce on the side.