Traditional Middle Eastern shawarma is thick, heavily spiced and marinated cuts of spit-roasted lamb, beef, or chicken. Trader Joe's shawarma chicken thighs ingredients include a robust seasoning blend that typically includes spices like onion and garlic powder, paprika, cinnamon, turmeric, cumin, pepper, coriander and parsley. There is also lemon juice in the shawarma marinade, which adds a nice punch of tart citrus to cut through all of the heavy spices.