Begin by patting the boneless skinless chicken thighs dry with paper towels to ensure a perfect sear. Season both sides generously with kosher salt and freshly ground black pepper.

In a bowl, combine half of your BBQ sauce with olive oil and a splash of water. Coat the chicken thighs thoroughly with this marinade. Allow to marinate for at least 30 minutes.

Preheat your grill to a medium temperature of 350ºF to 375ºF, oiling the grates to prevent sticking.

Place the marinated chicken thighs on the grates, closing the lid. Grill for approximately 3-4 minutes until caramelization forms, then flip and grill for another 4 minutes.

Lower the heat, brush the reserved BBQ sauce over the chicken, and cook for another 3-4 minutes, ensuring the chicken reaches an internal temperature of 170-175ºF.

Transfer the chicken to a plate and let it rest for 2-3 minutes before serving.