Expiration & Storage Tips
When does sourdough starter expire?
A sourdough starter doesn't exactly expire; instead, it can go dormant if not regularly fed. If you're baking regularly, your starter could live indefinitely! When actively using it, keep it at room temperature and feed it daily. Unfed, it can survive up to a week. If you're not a frequent baker, store the starter in the refrigerator and feed it once a week. Even if you forget to feed it for a longer period, it usually can be revived by regular feedings over a couple of days. However, if your starter changes color dramatically or develops mold, it's time to discard and start a new one.
How do you tell if sourdough starter is bad?
A healthy sourdough starter has a pleasant, slightly acidic aroma similar to beer, vinegar or ripe apples. If your starter smells exceedingly sour, vomity, or develops a pink, orange or any other color tinge, mold patches - it's bad news, and you should discard the starter. Also, if your starter hasn’t been fed for a longer time, it may develop a layer of dark liquid on top - this is called 'hooch' and is a sign of lack of feeding, but it's not harmful. Simply pour it off and feed your starter.
Tips for storing sourdough starter to extend shelf life
• Store your sourdough starter in a glass or plastic container. Avoid metal; as it can react with the acids in the starter.
• Ensure the container is tightly sealed. This helps keep unwanted bacteria out and prevent your starter from drying out.
• Consistent feeding is crucial. For room temperature storage, feed every 24 hours. For refrigerator storage, feed once a week.
• Always use room temperature water when feeding your starter. Cold water can slow down the fermentation process.
• If you're going on vacation or not planning to use it for a while, dehydrate it to make sourdough starter 'flakes'. This puts it into a dormant state for longer storage. Rehydrate with equal parts water and feed it to revive.