Organic Non-GMO, Freeze Dried, Sourdough Starter. 12 gr NEWFreeze Dried Sourdough Starter 170+ Year Heritage Culture Product Description If youve been wanting to bake real sourdough at home, this is the easiest way to start. Our freeze dried sourdough starter is made from a living 170+ year heritage culture, carefully preserved to give you consistent results, rich flavor, and a strong rise. This premium sourdough starter culture is freeze dried for long shelf life, then quickly reactivates with just flour and