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Why Does Bread Get Puffy? | Kitchen Science for Families

How does yeast make bread rise? Discover the kitchen chemistry behind fluffy bread, yeast fermentation, and baking science in this homeschool STEM episode.

Deep inside a warm bowl of dough, billions of invisible fungus chefs are throwing a wild, bubbly party. These tiny living microbes wake up from their afternoon nap the second they touch warm water and sweet sugar, immediately going to work feasting on starches and breathing out microscopic balloons of carbon dioxide gas.

As you knead the dough, you build a stretchy gluten net that acts like a giant trampoline, catching every single bubble…

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