• Question: Why does yeast cause flour to rise?

    Asked by shamail575 to Claire, Joanna, Kapila, Renata, Suzanne on 17 Jun 2013.
    • Photo: Claire El Mouden

      Claire El Mouden answered on 17 Jun 2013:

      Because it’s alive!

      When yeast are given flour (food) and water, the yeast can start breathing and multiplying. When they breathe, they make tiny bubbles in bread. The gas they release is locked inside the dough, makes the dough swell.

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