In a small mixing bowl, combine the ground cumin, ground coriander, smoked paprika, ground turmeric, garlic powder, onion powder, ground cinnamon, ground cardamom, ground allspice, salt, and black pepper. Mix well until all the ingredients are evenly distributed.
Transfer the mixture to an airtight container, such as a small jar, and store it in a cool, dry place until ready to use.
To use the chicken shawarma seasoning, rub it onto chicken thighs or breasts, ensuring all sides are well coated. Allow the chicken to marinate for at least an hour to absorb the flavors.