Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper for easy cleanup, or place a wire rack on top of the baking sheet for even crispier skin.

Thoroughly pat the chicken drumsticks dry with paper towels. This step is crucial for achieving crispy skin.

In a large mixing bowl, combine all the seasoning blend ingredients: salt, black pepper, garlic powder, onion powder, smoked paprika, dried thyme, and cayenne pepper (if using).

Add the dried chicken drumsticks to the bowl with the seasoning. Drizzle with olive oil. Toss everything together, ensuring each drumstick is evenly coated with the seasoning mixture.

Arrange the seasoned drumsticks in a single layer on the prepared baking sheet. Make sure there is ample space between each drumstick to allow for proper air circulation, which helps crisp the skin.

Roast in the preheated oven for 20 minutes.

Carefully flip the drumsticks. Continue roasting for another 20-25 minutes, or until the internal temperature reaches 165°F (74°C) at the thickest part (without touching the bone) and the skin is deeply golden brown and crispy.

Remove the chicken from the oven and let it rest on the baking sheet for 5 minutes before serving. This allows the juices to redistribute, ensuring tender and moist chicken.