Sourdough crispbread

Sourdough has been used for thousands of years. It is mentioned several times in the Bible, originating from Egypt about 6000 years ago. The sourdough arose when the bakers saved dough from the day before to start the next day's baking. Ordinary yeast bought in the store began to be used only in the 1800s. In addition to the fermenting ability of the sourdough, it gives the bread a broader flavour and a better structure. The sourdough forms when flour comes into contact with water and is stored at room temperature. Normally, rye flour is used to make sourdough, which is the base of baking an excellent sourdough knäckebröd.