• Question: how does heat make food rise?🍪

    Asked by evanotoole18 to Ciara, Elaine, Golnaz, Gonzalo, Yannis, Yvonne on 9 Nov 2017.
    • Photo: Ciara O'Donovan

      Ciara O'Donovan answered on 9 Nov 2017:

      When we add yeast or baking powder to something we are baking it creates carbon dioxide. This process is sped up when we add heat and this gas causes what we are baking to expand and rise. The heat then sets the bread or cake in place.

    • Photo: Gonzalo Delgado-Pando

      Gonzalo Delgado-Pando answered on 9 Nov 2017:

      Yeast need warm temperatures to work, they eat sugar and they “poo” a gas called carbon dioxide.
      If we are using baking powder this one have an acid and a base, two substances that when dissolved in any liquid(milk, water, etc) they react and generate the same gas as before, carbon dioxide.
      When we put the mix in the oven it starts getting solid and the gas makes it rise.
      There are some baking powders called double action that they have other substances that when heated they release more gas.

    • Photo: Ioannis Zabetakis

      Ioannis Zabetakis answered on 9 Nov 2017:

      https://www.thoughtco.com/how-baking-powder-works-607382

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