Sourdough Banana Bread (Starter Discard Recipe) - Umami Girl (2024)

FAQs

How much of your sourdough starter should you discard? ›

Twice a day (usually at 9:00 a.m. and 9:00 p.m.), I do the following when my starter is ripe: Discard the contents of my starter jar down to 20g (the discard can go in the compost, trash, or used in a discard recipe) To the jar, add 70g white flour, 30g whole rye flour, and 100g water.

A 1:2:2 feeding ratio would consist of one part existing starter, two parts flour and two parts water. For example, if you have 30g of existing starter, you would feed it 60g of flour and 60g of flour. The most common feeding ratios for daily maintenance are 1:1:1 or 1:2:2.

I would say the best way to differentiate between discard and active starter is that active starter is starter that has doubled and peaked whereas discard is any starter that is not the main starter and is not being used in an active sourdough recipe as a leavening agent.

Technically, sourdough discard has the same benefits as sourdough starter, since they are both wild yeast ferments. In terms of beneficial lactic acid bacteria, natural yeasts acetic acid and colonies of microbes, they are both full of them.

As such, it is best to keep your discard in the fridge, where it will last for up to one week. Of course, you can only rely on it lasting that long if you store it correctly.

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.

Have you ever wondered whether you have to clean your sourdough starter jar? The simple answer is you don't need to clean your sourdough jar. It's just not necessary to clean your jar all that regularly, unless it's super crusty or you can't get your starter out or fresh flour and water in.

When you overfeed a starter, the culture will multiply more quickly, leading to a stronger and more active starter. It's important to note that overfeeding can also have negative effects on a sourdough starter if done excessively or too frequently.

Typical feeding ratios are 1:2:2 or 1:3:3 (old sourdough: fresh flour: water). However, even extreme ratios like 1:50:50 would still work. In that case, the freshly fed sourdough would just require more or much more time to grow and reach its peak, as judged by the maximum volume increase in the jar (at least doubled).

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.

Does sourdough discard have to be active to use? ›

One note: Don't start using your discard until your starter is really up and running. In other words, if you've just started your starter and it's not yet established, then you shouldn't save that discard. Wait until you have a healthy, active sourdough starter, then keep any discard from routine feedings.

Technically, yes you can start another sourdough starter with your sourdough discard - however you don't need two sourdough starters! So as long as your starter is at least 7 days old, why not bake something yummy with the discard?

I left my sourdough discard out at room temperature for a few days. Is it okay? 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.

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.

I recommend keeping sourdough discard for about one week, but I do know others who keep it for much longer. After one week, there is a higher risk of mold or bad bacteria growing on the discard.

As you can see (or smell!), a sourdough starter should have a sour, tangy, and yeasty aroma, with subtle undertones depending on the type of flour used. However, offensive or foul odours such as rancid, putrid, or mouldy smells are signs that something has gone wrong with the starter.

If you don't discard your sourdough starter, it will grow too big and be unmanageable. Not to mention you will go through an unmentionable amount of flour.

All you need to do is take 20g of the starter you already have and then feed it with 20g of flour and 20g of water (so 1:1:1). Then you'll have a 60g starter, which is considered a smaller amount. You can of course reduce these amounts even further if you wish, but this is a reasonable size to keep waste to a minimum.

Barb Alpern, one of the sourdough experts on our Baker's Hotline, advises callers to discard the hooch if it's darkened to black. “At this point, the liquid is all sourdough waste products and isn't going to contribute anything very positive to the starter.