Preheat oven to 350°F.
Combine ground fennel, onion powder, garlic powder, salt and pepper in a large bowl.
Dip drumsticks in melted ghee. Do not discard any extra ghee, as this will be used for basting later. Roll drumsticks in ground fennel mixture.
Place drumsticks on wire rack laid on top of baking sheet, and roast for 10 minutes.
Baste drumsticks with remaining ghee, and roast for another 10 minutes. Flip the drumsticks, then baste once more. Roast for 20 more minutes.
Remove from oven, and let rest for at least 3 minutes.