Can You Create a Sourdough Starter from Store-Bought Bread?

Choosing the Right Bread

When selecting store-bought bread for creating a sourdough starter, look for high-quality products containing wild yeast and bacteria. These microorganisms are naturally present in the dough during fermentation. Opt for breads made with a long fermentation time, such as artisan or sourdough breads, as they tend to have a higher concentration of wild yeast and bacteria. Some good options include breads with a dense crumb, a sour smell, and a slightly tangy taste.

Creating the Initial Starter

To create the initial starter, take a small piece of the store-bought bread (about 1-2 tablespoons) and place it in a clean glass or ceramic container. Add a small amount of water to the bread, just enough to create a thick paste (about 1-2 tablespoons of water per 1 tablespoon of bread). Cover the container with a cloth or plastic wrap and let it sit in a warm, draft-free place for 24-48 hours. This initial mixture is called the “spontaneous starter” and should start to bubble and emit a sour smell within a day or two.

Maintaining the Starter

After the initial 24-48 hours, discard half of the starter and add another 1-2 tablespoons of flour and 1-2 tablespoons of water to the remaining starter. Mix well and repeat this process of discarding half of the starter and feeding it fresh flour and water every 24 hours. This maintenance routine should help the starter become more active and robust over time. It may take 7-10 days for the starter to become active and bubbly, indicating that it’s ready for use in bread recipes.