Preheat and Prep: First things first, get your oven preheating to 200°C (180°C Fan/Gas Mark 6). Line a large, rimmed baking tray with foil for easier cleanup. If you have a wire rack that fits inside the tray, place it on top. This allows air to circulate for extra crispy skin.

Pat and Rub the Chicken: Use a paper towel to pat the chicken thighs completely dry. This is a crucial step for achieving that crispy skin we all love. In a small bowl, mix together all the dry rub ingredients: brown sugar, smoked paprika, garlic powder, onion powder, salt, and pepper.

Season Generously: Place the dry chicken thighs in a large bowl, drizzle with the olive oil, and toss to coat. Sprinkle the dry rub all over the chicken, using your hands to make sure each piece is evenly and generously coated. Don't forget to get some under the skin!

Arrange and Bake (Part 1): Arrange the seasoned chicken thighs on your prepared baking tray (or wire rack), making sure they are skin-side up and not touching each other. This prevents them from steaming. Place the tray in the preheated oven and bake for 25-30 minutes.

Make the BBQ Sauce: While the chicken is having its first bake, we'll make the sauce. In a small saucepan over a medium heat, combine all the BBQ sauce ingredients: ketchup, cider vinegar, dark brown sugar, Worcestershire sauce, treacle, Dijon mustard, and the extra smoked paprika. Whisk everything together and bring it to a gentle simmer. Reduce the heat and let it bubble away for 5-7 minutes, stirring occasionally, until it has thickened slightly. Set aside.

Start Basting: After the initial 25-30 minutes of baking, remove the chicken from the oven. Using a basting brush, generously coat the top and sides of each chicken thigh with the BBQ sauce.

Return to Oven & Continue Basting: Place the tray back in the oven. Bake for another 15-20 minutes, taking it out to baste with more sauce every 5 minutes. This layering process is what creates that irresistible sticky glaze.

Final Check: The chicken is done when the glaze is dark and caramelised and the meat is cooked through. The safest way to check is with a meat thermometer; it should read at least 74°C when inserted into the thickest part of the thigh, avoiding the bone. For a little extra char, you can pop it under a hot grill for the last 1-2 minutes, but watch it like a hawk to prevent it from burning.

Rest is Best: Remove the chicken from the oven and transfer it to a clean platter. Let it rest for 5-10 minutes before serving. This allows the juices to redistribute throughout the meat, ensuring every bite is as juicy as possible.