Wild Yeast vs Commercial Yeast: What's the Difference?
When most people think of bread, they think of yeast. But not all yeast works in the same way.
Most modern bread is made using commercial baker's yeast, a carefully cultivated strain designed to produce reliable results and help dough rise quickly. It's efficient, predictable and perfect for large-scale bread production.
Sourdough takes a different approach.
Instead of relying on a packet of commercial yeast, sourdough uses a living starter culture containing wild yeast and naturally occurring bacteria. These microorganisms develop over time, creating a unique ecosystem that helps the dough rise while also contributing to its flavour and character.
One of the biggest differences between wild yeast and commercial yeast is speed. Commercial yeast is designed to work quickly, often allowing bread to be mixed, proofed and baked within a few hours. Wild yeast works more slowly, requiring longer fermentation times and a little more patience from the baker.
Another key difference is flavour. Commercial yeast focuses primarily on producing carbon dioxide to make dough rise. A sourdough starter contains a wider range of microorganisms, creating the complex flavours and aromas that traditional sourdough is known for.
Neither method is better or worse—they simply produce different results. Commercial yeast offers convenience and consistency, while sourdough offers a slower, more traditional approach to bread making.
For many bakers, that's part of the appeal. Working with a living sourdough starter means becoming part of a baking tradition that has been passed down for thousands of years, long before packets of commercial yeast ever existed.
