Kvass from birch juice without yeast
Birch juice to kvass I use every spring, as long as it is. He is not getting it, but buy in the nearest village from a trusted person. He suggested recipe – how to make brew at the birch SAP without the use of a yeast starter culture. The juice seller told me to add sugar, only bread, he wraps it in gauze and put it in the container. I didn't use the bread and biscuits, without any gauze. The first time add sugar did not, but for my taste, the drink has still sour, so next time still added sugar. And, of course, not for everybody.