Somaq / Sumac is often used as a souring agent in Lebanese, Arabian and Turkish cuisine, instead of the more usual lemon, tamarind or vinegar found in dishes from other regions. Sumac is a flowering shrub known scientifically as Rhus coriaria. People use its red berries as a culinary spice and herbal. Made from dried berries, sumac is a versatile spice that complements a great range of dishes.