What Makes Sourdough Bread Sour
The sour taste of sourdough bread comes from lactobacillus, which lives in symbiosis with yeast, feeding on byproducts of the yeast fermentation. The sour taste itself comes from the lactic acid produced by the lactobacillus. This also helps the bread last longer without spoiling as most microbes can’t handle the acidic environment created by the lactobacillus.
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