For the rhubarb liqueur, clean the rhubarb, wash, cut into bite-sized pieces, put in a large container with sugar, vanilla sugar and the grain.
Close tightly and store in a cool place for about 14 days. Pour the liquid through a cloth, fill into bottles and store tightly closed in the refrigerator.
Preparation Tip:
The rhubarb liqueur can also be used to refine cake creams.