Making a sourdough starter isn’t difficult, complicated or time consuming. It’s similar to the method used by Professor Calvel, who combined dark rye and white flours to cultivate the initial fermentation. You’ll be amazed at how easily it works. A sourdough results from the fermentation of natural yeasts in flour. The flour’s yeast doesn’t act alone; it lives in a state of symbiosis (this just means that they can’t get along without each other) with Lactobacilli bac