There was a recipe for sourdough starter in a compilation of articles written by Amy Dacyczen (sp?). Book title: The Tightwad Gazette. It not only worked, the bread cost less than 25 cents a loaf (not including utilities, but she tells you how to figure it out.)
I’ve been making sourdough starter since I was 29, and have recipes for muffins, bread rolls, and even donuts. All surprisingly delicious.
I have a Tightwad Gazette and several other books of the same ilk. I don’t like things with lots of preservatives. My personal belief is that is why folks have the odd health problems they do today: ingesting preservatives and other man-made ingredients from the foods they eat.
Just my opinion.