Kvass from birch sap without sugar
Kvass from birch sap without sugar, although the juice is sweetish, turns out to be bland, so yeast or dried fruits and bread are added to it to enhance fermentation. You are offered the simplest recipe for making such kvass - from juice and yeast. The drink will be well carbonated and with a pleasant sour taste, and you can sweeten it in a glass. Kvass without sugar does not acidify and is well stored.