Sourdough is naturally leavened bread, which means it doesn't use commercial yeast to rise. Instead, it uses a 'starter' – a fermented flour and water mixture that contains wild yeast and good bacteria – to rise. This also produces the tangy flavour and slightly chewy texture you'll find in sourdough. These products are made in a private home, not subject to WI state licensing or inspection. Ingredients include - not limited to - flour, water, salt. Added ingredients with flavored breads/baked goods