Are there risks in mixing different types of starters?

Different Microbial Compositions

When you mix different types of starters, you’re combining unique microbial populations, each with its own set of enzymes, acids, and flavor compounds. This can create an unpredictable environment that may not work well for bread production. For example, a starter with a high percentage of Lactobacillus sanfranciscensis may not complement a starter with a high percentage of Candida milleri.

Impact on Fermentation

The microbial competition that arises from mixing starters can impact fermentation rates and outcomes. If one starter type is dominant, it may outcompete the other, resulting in an unbalanced fermentation process. For instance, a starter with a high water content may require a longer fermentation time, while a starter with a lower water content may ferment too quickly. This can lead to inconsistent dough development and texture.

Considerations for Successful Mixing

If you still want to mix different starters, make sure to follow some guidelines. Start by creating a ‘master’ starter by mixing equal parts of each starter type. Then, use this master starter in your bread recipe, rather than mixing the original starters directly into the dough. This can help to create a more balanced microbial environment and reduce the risk of inconsistent results. Additionally, keep the ratio of the mixed starter to the total dough weight low (around 10-15%) to minimize the impact of microbial competition.