Season the chicken thighs. Rub the chicken thighs with your chosen dry rub. For more flavor, season the night before, but it’s optional.
Sear. Heat a tablespoon of vegetable oil in a heavy skillet over medium heat. Then, sear the chicken for 2 minutes per side until the skin is golden. Avoid fully cooking the meat in the slow cooker to prevent overcooking.
Cook in the slow cooker. Place the seared chicken thighs in the slow cooker and pour barbecue sauce. No need to stir or add extra liquid. Cover and cook on high for 3-4 hours or low for 5-6 hours until the chicken reaches an internal temperature of 165°F (74°C).
Serve. Remove the chicken thighs with tongs and serve with extra barbecue sauce from the slow cooker on the side. Pair with your favorite sides, like coleslaw or cornbread, for a complete meal.