Sumac has a pleasant tangy taste with a hint of citrus fruitiness and virtually no aroma. A sprinkling of this pretty purple spice adds a tangy lemony flavour to meat and salads. Sumac is a widely used essential spice in Middle Eastern and Mediterranean cooking. It's used in everything from dry rubs marinades and dressing. But its best use is sprinkled over food before serving. It pairs well with vegetables grilled lamb chicken and fish.