Creating delicious Jamaican Jerk Chicken is straightforward if you follow these steps:

1. Prepare the Marinade: In a blender, combine allspice, thyme, cinnamon, garlic powder, onion powder, black pepper, salt, Scotch bonnet peppers, green onions, ginger, lime juice, soy sauce, vegetable oil, brown sugar, and chopped onion. Blend until smooth.

2. Marinate the Chicken: Place the chicken thighs and drumsticks in a large bowl or resealable plastic bag. Pour the marinade over the chicken, ensuring all pieces are well coated. Seal the bag or cover the bowl and refrigerate for at least 2 hours, or overnight for optimal flavor.

3. Preheat the Grill: If grilling, preheat your grill to medium-high heat. If using an oven, preheat to 425°F (220°C).

4. Remove Chicken from Marinade: Take the chicken out of the marinade and let any excess marinade drip off. Discard the leftover marinade.

5. Grill the Chicken: Place the chicken on the grill. Cook for about 30-40 minutes, turning occasionally, until the internal temperature reaches 165°F (75°C) and the skin is crispy. Time may vary based on size and method.

6. Bake the Chicken: If baking, place the marinated chicken on a baking sheet lined with parchment paper and roast for 40-50 minutes, or until cooked through and golden.

7. Rest the Chicken: Once cooked, remove the chicken from the grill or oven. Allow it to rest for about 10 minutes to maintain moisture before serving.

8. Garnish: If desired, sprinkle with fresh cilantro for added flavor and presentation.