Sourdough Discard 101 (2024)

FAQs

How much of my sourdough starter should I discard? ›

You can store mature sourdough discard in the refrigerator indefinitely. As long as there is no mold, it is good to use. It may develop a grayish liquid on top called “hooch” which can be poured off before use or stirred in. If you stir it in, the flavor will become more sour.

As a side note, most often discard recipes will call for 100% hydration discard. This means that the discard comes from sourdough starter that has been fed equal weights of flour and water. Add the discard in the recipe and follow the instructions.

When you are ready to bake, remove the discard from the fridge and let it come to room temperature. I recommend keeping sourdough discard for up to one week. If needed, mark the date on the container in your refrigerator. After one week, there is a higher chance of the discard growing bad bacteria or mold.

Nope! Once the sourdough starter is established on day 8, all you have to do is just give it flour and water. You no longer need to discard half of it.

You can use old sourdough discard if it's been stored in the fridge, however, you really want to use it up within a week - 2 weeks max.

Stored in the freezer, sourdough discard will theoretically keep indefinitely. I've left it in the freezer for as long as six months, untouched (i.e., I don't add or remove discard). Before using it, let it thaw in the refrigerator or at room temperature, never in the microwave. The microwave will cook/kill it.

As long as your kitchen isn't too warm (I'd say 78°F or higher) your starter/discard will be fine stored at room temperature for at least a few days without feeding. The flavor will get more acidic the longer it sits.

With each sourdough starter feeding, you'll be discarding some to avoid it from becoming overly acidic. Most will compost or trash this discard, but you can save it and use it in other recipes!

But if there's a lot of liquid (say, more than half an inch or so), and especially if it's very dark, feel free to pour it off: not because it's “bad,” but because that amount of liquid may change your starter's hydration enough to make a difference in your baking.

Can you make more sourdough starter from discard? ›

One of the amazing benefits of sourdough discard is that you can use it to create new starters, which are known as levains. These off-shoots from the mother starter can be used to experiment with different types of flour or given as a gift – there's nothing quite like sharing an entire ecosystem with your loved ones.

This is not always a bad thing, and sometimes extra flour is necessary to rectify a runny starter or make the starter peak at a later time. Feeding a sourdough starter too much water is worse as the starter won't have enough flour to feed on and it will be runny and less bubbly than it should be.

Starter that's kept at room temperature is more active than refrigerated starter, and thus needs to be fed more often. Room-temperature starter should be fed every 12 hours (twice a day) using the standard maintenance feeding procedure: discard all but 113g, and feed that 113g starter with 113g each water and flour.

If you don't get rid of the excess, eventually you'll have more starter than your feedings can sustain. After a few days, your daily 1/4 cup flour and water won't be enough to sustain your entire jar of starter, and your starter will be slow and sluggish, not much better than discard itself.

Absolutely you can! Active starter can be used in the same way as sourdough discard in sweet or savory baking. You can add active sourdough starter to any recipe you would add discard to following the same calculation.

Do I have to discard my sourdough starter? It would be best if you discarded some portion of your starter each time you feed it unless you want to continue to let it grow. Eventually, you need to discard the used “food” (flour and water) that's been used to sustain your starter during the last fermentation period.

stir your starter in between feedings - try stirring it twice in between feedings and really give it a chance to get oxygen into the mix. This will help to activate your starter without too much effort.