Preheat the oven to 400°F (200°C). Line a baking sheet with aluminum foil and place a wire rack on top. Spray with non-stick cooking spray.

Pat the chicken drumsticks dry with paper towels. This helps ensure crispy skin.

In a large bowl, combine the olive oil, garlic powder, onion powder, paprika, salt, and pepper. Add the drumsticks and toss until evenly coated.

Arrange the seasoned drumsticks on the prepared rack, leaving space between each piece.

Bake in the preheated oven for 25 minutes.

Remove drumsticks from the oven and brush each with barbecue sauce, turning to coat all sides. Use about half of your sauce for this first coating.

Return to the oven and bake for an additional 10 minutes.

Brush the remaining barbecue sauce over the drumsticks and bake for a final 5-7 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and the sauce is caramelized.

Let rest for 5 minutes before serving to allow the juices to redistribute.

Garnish with fresh parsley if desired and serve hot.