While it may sound exotic, it is not very difficult to prepare Leben at home. You will need one gallon of milk and 8 oz. of regular plain yogurt. Pour the milk into a pot that is sufficiently large and put it on the stove, at medium heat, allowing the milk to warm sufficiently until it forms bubbles and starts to rise.
How is Leben made?
Leben as a drink is traditionally prepared by letting milk ferment for around 24 hours, then churning and removing the butter. The remaining buttermilk can keep for several days at room temperature. In modern times, it is produced industrially.
How is Laban made?
As a drink, laban has been traditionally prepared by allowing milk to ferment for about 24 hours. After that point, it's churned and the butter is removed. The resulting liquid—the strained out buttermilk—would keep for several days at room temperature. ... Alternate spellings include lben, lban, and leben.