Preheat oven to 425 degrees. Line a baking sheet with foil and top with a metal, oven-safe cooling rack. Set aside.
Pat chicken drumsticks dry with a paper towel. This is an important step to help your chicken get crispy when baking.
In a small bowl, combine onion powder, garlic powder, brown sugar, salt, paprika, pepper, and cayenne pepper.
In a large bowl, add drumsticks. Drizzle with olive oil. Pour spices over drumsticks and toss to coat.
Place drumsticks onto prepared baking sheet. Bake for 35-45 minutes, or until chicken reaches an internal temperature of 165 degrees Fahrenheit.
Remove from oven, serve, and enjoy.
I highly recommend using an oven-safe cooling rack to bake your chicken. Using this method helps your chicken to bake up crispy because your drumsticks won't be sitting in grease while they cook.
If you plan to serve your chicken without skin, I suggest rubbing your spices underneath the skin before baking, then removing the skin once your chicken is cooked through. The skin helps to prevent your chicken from drying out while baking.