A Culinary Adventure in the Art of Sourdough Crackers Sourdough has been a staple in baking for thousands of years, dating back to ancient civilizations. The fermentation process, initially discovered by accident, led to the development of a wide variety of sourdough-based breads. However, sourdough discard crackers are a more recent innovation, created as a sustainable way to use up excess sourdough starter while making a flavorful, crispy snack.