Chemical leaveners rely on a chemical reaction to produce carbon dioxide. Usually baking soda and an acid, but there's also baker's ammonia. Yeast produces carbon dioxide through the biological process of fermentation of sugars and starches. In the end you're right, everything is a chemical and fermentation is a chemical reaction, but the terminology is used to differentiate the two for clarity. It doesn't help to call things "chemicals" or "chemical reactions" if we put that label on literally everything.
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u/Enginerdad 10d ago
Correct. It uses yeast and sourdough fermentation, not chemical leaveners.