Tartu lab experiments with sourdough-fermented rhubarb and cucumbers

A laboratory in Tartu Science Park is pushing the boundaries of fermentation by using sourdough starter to preserve and ferment unexpected vegetables and fruits. OÜ BioCC is testing recipes including sourdough-fermented rhubarb, cucumbers, radishes, and cauliflower. The experiments open up exciting new possibilities in natural food preservation.

A food science laboratory at Tartu Science Park is exploring an unusual application of sourdough starter culture — using it not just for bread, but to ferment a wide variety of vegetables and even fruit. The team at OÜ BioCC has been developing and testing recipes that include sourdough-fermented rhubarb, cucumbers, radishes, and cauliflower.

While sourdough is most commonly associated with bread baking, its active cultures of wild yeast and lactic acid bacteria can be applied to other foods as well. The fermentation process creates a tangy, probiotic-rich product similar in principle to traditional pickled vegetables, but with a distinct flavour profile influenced by the starter culture.

The OÜ BioCC lab in Tartu is positioning itself at the intersection of food science and culinary innovation, experimenting with combinations that challenge conventional assumptions about what sourdough fermentation can achieve. The results of these trials could eventually inform new product lines or inspire home fermenters across Estonia.