In a shallow dish, combine and whisk together all ingredients, except the chicken drumsticks.
Lay the drumsticks in the marinade in a single layer, and marinate in the fridge for 6-24 hours, flipping halfway through.
Cave Tools Chicken Wing & Leg Rack method: Preheat the grill to medium high heat. Fit the drumsticks into the racks, and place some hardy vegetables tossed with a little bit of oil and spices on the drip tray. Place on the grill, cover and let it cook for 45 minutes, or until the chicken is cooked through.
Direct grill method: Preheat the grill to medium high heat. Place the chicken on the rack and grill for 30 minutes, turning every 5 minutes.
Oven method: Preheat oven to 400 degrees F. Place the drumsticks on a baking sheet in a single layer. Bake for 40 minutes, until the chicken is dark brown.
While the chicken is cooking, heat the marinade in a small saucepan on the stovetop over high heat. Once the sauce starts boiling, reduce the heat and simmer until the sauce is reduced and thickened, about 7-10 minutes. Drizzle over chicken before serving.