1. Preheat the oven to 400°F (200°C).

2. In a small bowl, mix together chili powder, cumin, paprika, garlic powder, salt, and pepper to create a spice rub.

3. Rub the spice mixture all over the chicken, ensuring it's evenly coated.

4. Place the chicken in a roasting pan and drizzle with olive oil.

5. Roast in the preheated oven for 30-40 minutes or until the chicken is cooked through and golden brown.

6. Let the chicken rest for 5-10 minutes before slicing and serving.