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How yeast makes bread bubbly and delicious

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Bubbly pizza crust, fluffy doughnuts, and airy bread all rely on yeast to get their lift, but it does more than just help the dough rise.

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Yeast are living microorganisms in the fungi group. Dry active, instant, and brick yeast are grown commercially and available in grocery stores. Anyone can harvest wild yeast at home by making a sourdough starter.