
Sourdough starter is a living culture of wild yeasts and beneficial bacteria cultivated in a mixture of flour and water. It's the key ingredient for making authentic sourdough bread, providing a tangy, complex flavor and chewy texture. The starter appears as a bubbly, slightly acidic-smelling mixture that doubles in size after feeding. Maintaining a healthy sourdough starter requires regular feeding with flour and water, a process that promotes the growth of these microorganisms and ensures a robust fermentation process for naturally leavened baked goods. It's what gives sourdough its distinctive characteristic flavor and rise, making it a crucial component for artisan bread making and sourdough baking recipes.
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Sourdough starter can be stored in the refrigerator to slow down fermentation. Before refrigerating, feed the starter and allow it to sit at room temperature for a few hours. Then, place it in an airtight container and store it in the refrigerator for up to two weeks. To revive the starter, take it out of the refrigerator, discard all but a tablespoon or two, feed it, and let it sit at room temperature until it becomes active again. For longer storage, the starter can be dried and rehydrated later, or frozen in small portions and thawed as needed.