Can you store sourdough starter in a cooler during hot weather?

Maintaining a Healthy Sourdough Starter in a Cooler

If you need to store your sourdough starter during hot weather, a cooler can be a suitable option. However, keep in mind that coolers are not designed for long-term storage and can fluctuate in temperature. To keep your starter healthy, feed it once a week with equal parts of flour and water by weight (e.g., 50g flour + 50g water). This will help maintain its microbial balance and prevent it from drying out.

Temperature Considerations

When storing your starter in a cooler, aim for a temperature range between 39°F and 45°F (4°C and 7°C). Avoid temperatures below 36°F (2°C), as this can slow down the starter’s metabolism, potentially leading to over-proofing. If possible, wrap the cooler in an insulating material like foam or towels to minimize temperature fluctuations.

Monitoring Your Starter’s Condition

Regularly check your starter’s condition when stored in a cooler. It should be slightly bubbly and have a tangy aroma. If it becomes too dry or develops an unpleasant odor, it’s likely due to inadequate feeding. In such cases, discard half of the starter and feed it fresh flour and water. This will help revive its health and ensure it remains suitable for baking.