01 -
Pat the chicken thighs dry. Rub with olive oil, vinegar, brown sugar, smoked paprika, garlic powder, onion powder, salt, black pepper, and cayenne if using. Rest at room temperature while the grill heats, about 20 minutes.
02 -
Prepare a two-zone grill with one side at medium-high heat and one cooler indirect side. Clean and lightly oil the grates.
03 -
Place the chicken skin-side down over direct heat. Grill for 3-4 minutes, just until the skin has grill marks and releases from the grate.
04 -
Move the thighs to the indirect side. Cover and cook for 20-25 minutes, turning once or twice, until the thickest part is about 160°F.
05 -
Brush the thighs with BBQ sauce, then cook for 5-8 more minutes, turning and brushing once more, until sticky and the thickest part reaches 175-185°F.
06 -
Transfer the chicken to a clean platter and rest for 5 minutes. Sprinkle with parsley if using and serve with extra BBQ sauce.