Rhubarb syrup is one of the most colorful and delicious original Iranian syrups that dates back to the city of Neishabour. Guevara and hearty rhubarb syrup is exactly the cool drink you need in the hot seasons. The ingredients of this delicious syrup are rhubarb stems, water and sugar and it is very easy to prepare. Rhubarb is a pink plant that is used in cooking stews, broths, tear gas, salads, cocoa, syrups or even desserts. Rhubarb is very similar to celery and can be eaten raw or cooked.