Wild Yeast Starter

1
Wild Yeast Starter

• Sourdough Bread

2
Yeast

• single-celled fungus that causes fermentation
• found naturally in the air
• can buy dried as a powder

3
Fermentation

• breaking down starches in wheat to form sugar
• carbon dioxide and alcohol are released
• CO2 makes bread rise

4
Flour

• from wheat
• contains protein gluten
• when kneaded gluten forms long chains
• these chains hold CO2 in, creating tiny holes
  seen in bread

5
Starter

• liquid in which yeast fungi are constantly kept
  alive
• capture wild yeast to make
• needs to be fed with flour and water every 1-2
  days
• used to make sourdough bread