alcoholic, comprehensive guides, how-tos, non-alcoholic, recipes, sips, tasty DIYS, vegan, vegetarianMay 25, 2020<May 25, 2020 What Is Shrub? + How To Make It! Shrub is a concentrated fermented syrup made of fruit or vegetables, sugar, and vinegar. It’s refreshingly sweet and tart, good for digestion, and best of all, very simple to make!