Preheat the oven to 425 degrees.
Cover a rimmed baking sheet (13×18” works well) with aluminum foil large enough to cover and wrap around the edges of the pan. This makes clean up easy.
Combine all the dry spices in a small bowl. Set aside.
Place all the drumsticks in a 2-gallon size sealable plastic bag, or a large bowl.
Pour the oil into the bag, seal it, and shake/“massage” the bag to distribute the oil. If using a bowl, drizzle the oil over the drumsticks and use your hands or a spoon to toss the chicken to coat with the oil.
Open the bag and shake about one third of the spice mixture over the chicken, seal the bag and shake to distribute the spices. Open the bag again and add another third of the spices and repeat with shaking and/or “massaging” the bag so the spices evenly coat all the chicken pieces. If using a bowl, same process with adding spices in thirds, and tossing or stirring to coat the chicken.
You can either save the last third of the spices for another use, or you can go ahead and add the remaining spices, especially if you are using around 5 pounds of drumsticks.
Once the spices have been evenly dispersed throughout the chicken, open the bag and take out the drumsticks and place them an inch or so apart on the foil-lined baking sheet. You should be able to get them all on a large baking sheet. If not, you can cook these in batches.
Bake in the preheated oven for 25 minutes, or until a probe thermometer reads 163. (Yes, I know chicken must be cooked to 165 internally. You are going to broil the chicken. That will cook them the last few degrees.)
Turn the broiler on and allow the chicken skin to crisp up, about 1 minute and 30 seconds. You must watch so that you don’t burn your skin. Your oven may take less or more time.
Pull the pan from the oven and using tongs, turn the chicken over and broil the other side for another 1 minute and 30 seconds, or until the skin is crispy and nicely browned.
Remove the pan from the oven and let the chicken cool slightly and serve.