Double fermentation is an essential process in modern soda biscuit production lines. Compared with single fermentation, it creates a superior texture, deeper flavor, and the signature crispy layers found in high-quality soda biscuits. In industrial biscuit manufacturing, fermentation defines the dough’s internal structure, flavor complexity, and product consistency. The first fermentation allows yeast to activate gradually, forming gluten and producing organic acids that develop the biscuit’s foundational flavor. The second fermentation, conducted after adding baking soda or flour, refines dough texture, balances acidity, and redistributes gases for even layering. This results in enhanced crispness, uniform bubbles, and a light “soda” aroma.
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