• Question: why does yeast rise?

    Asked by sebisepic to Jen, Jill, Mel, Phil, Stef on 18 Mar 2013.
    • Photo: Melissa Brereton

      Melissa Brereton answered on 18 Mar 2013:

      Yeast itself doesn’t actually rise. When it is warmed up, it produces carbon dioxide gas which forms bubbles and allows the bread to rise

    • Photo: Stefan Piatek

      Stefan Piatek answered on 18 Mar 2013:

      It also makes ethanol – alcohol. So you get alcohol and carbon dioxide, which is why you get bubbles in beers (well some have extra carbon dioxide added) and other alcohols like champagne.

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