What is sourdough discard? And what should I do with it? (2024)

In this article:

  • What is sourdough discard?
  • Why do you discard sourdough starter?
  • What to do with sourdough discard
  • How to add sourdough discard to any recipe
  • How to store sourdough discard
  • How long is sourdough discard good for?

If you’re just learning to bake sourdough bread, you might be confused by all the terms bakers casually bandy about. Ripe starter, autolyse, hydration, banneton … it’s like a whole different language. One of the most common terms — and the most confusing — is discard. What exactly issourdough discard? And what the heck are you supposed to do with it?

We’re here to answer all that and more.

What is sourdough discard?

When you feedsourdough starter, you must remove a portion of the starter to make room for the flour and water you’re adding to the mixture. Sourdough discard is the portion of starter that gets removed as part of its routine maintenance.

What is sourdough discard? And what should I do with it? (1)

Photography by Rick Holbrook; food styling by Kaitlin Wayne

Why do you discard sourdough starter?

Bakers often ask us, “Do I reallyneed to discard my starter?” And the answer is yes. Regularly discarding a portion of your starter and refreshing it with flour and water keeps the microorganisms in it healthy, happy, and thriving — and healthy starter translates to better bread. And if you didn’t remove a portion of the starter when you add flour and water, you'd quickly have way, way too much starter.

But just because you remove sourdough discard, that doesn’t mean you have to actually throw it away. You can bake with it, either immediately or at a later date, and make everything from bread to cookies to granola and more.

What to do with sourdough discard

If you can’t bear the thought of tossing your discard into the trash bin or compost (psst: never put it down the drain!), you can use it in other ways. We have a whole collection of Sourdough Discard Recipes that you can bake with your sourdough discard; in these recipes, discard adds flavor but doesn’t do much in the leavening department.Some of our favorite sourdough discard recipes include:

  • Classic Sourdough Waffles or Pancakes
  • Sourdough Pizza Crust
  • Sourdough Banana Bread
  • Sourdough Chocolate Chip Cookies
  • Buttery Sourdough Biscuits
  • Sourdough Granola
  • Easiest Sourdough Discard Crackers

You can even make bread with sourdough discard. We have several recipes that can be made with unfed sourdough, instead of the typical ripe starter. Just note that it’s best if your starter has been fed at least once in the past week; a neglected starter won’t make great bread. Try sourdough discard in these bread recipes:

  • Pain de Campagne (Country Bread)
  • Do-Nothing Sourdough Bread
  • Easy Everyday Sourdough Bread
  • Jeffrey’s Golden Durum Sesame Bread

Sourdough discard can also be used to start a new sourdough starter. You can gift the discard to a friend looking to start their own sourdough journey; all they need to do is feed it with water and flour to have a thriving starter of their own. See more here: You finally got a sourdough starter. Now what?

How to add sourdough discard to any recipe

You can use sourdough discard in any recipe calling for “unfed” or “discard” sourdough starter, but it can also be used in recipes that don’tcall for it.

Because sourdough starter is made of flour and water, think of it as a replacement for some of the flour and water (or milk) in your recipe. The key is that the recipe must include enough liquid and flour for you to substitute in sourdough discard instead. A cookie recipe, for instance, likely wouldn’t be a good choice, since cookies don’t typically have a significant amount of liquid. But muffins, snacking cakes, quick breads, and pancakes all usually include enough liquid for the substitution to work. These are also generally forgiving recipes that adapt well to some tinkering; this is important, because adding sourdough discard will impact a recipe and potentially alter the final result.

Remember, you’re substituting starter for some of the recipe’s flour and liquid, not simply adding: When discard starter goes in, an equivalent amount of flour and water must come out to preserve the recipe’s balance of ingredients.

How to add sourdough discard to a recipe:Because sourdough starter is usually equal parts flour and water by weight, take the amount of discard starter and divide it by two; that is how much flour and water you’re subbing for. For instance, if you have 100g starter, that is equal to 50g flour and 50g water. Deduct those amounts from the flour and liquid listed in the recipe. Add the discard starter to the recipe as a replacement.

How much sourdough starter can you substitute? We recommend substituting starter for no more than 1/3 of the flour in the recipe. If you like the result, you can try increasing the percentage the next time. And remember that this process often involves a lot of trial and error; you won’t always get great (or even good) results! But if you’re willing to experiment, try subbing some discard into your recipes and monitoring the results.

Learn more here: Adding sourdough to a recipe, as well as these posts on adding sourdough to cake and adding sourdough discard to dinner rolls.

What is sourdough discard? And what should I do with it? (2)

Photography by Kristin Teig; food styling by Liz Neily

How to store sourdough discard

You can store sourdough discard in a separate container, then bake with it when you want — for instance, maybe you fed your starter on Tuesday, leaving you with discard that you want to use to bake pancakes on Saturday.

To store sourdough discard, keep it in a lidded container — a jar, sourdough crock, or other vessel you’d use to store starter will all work. You can combine many days’ worth of discard in a single jar, adding to it every time you feed your starter until you’re ready to bake with your discard. If you’re planning to use that day, discard starter can be kept out at room temperature. Otherwise, store it in the fridge until you’re ready 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.

How long is sourdough discard good for?

Kept in the fridge, sourdough discard will last several weeks. Similar principles apply to sourdough discard as they do to starter; black liquid on top is totally fine, but streaks of pink or orange mean that it’s likely contaminated and should be tossed.

Just learning to bake with sourdough? Check out ourbeginner’s guide to sourdough, then dive into our fullresource on learning sourdough baking.

Cover photo by Kristin Teig; food styling by Liz Neily.

What is sourdough discard? And what should I do with it? (2024)

FAQs

What is sourdough discard? And what should I do with it? ›

Sourdough discard is the portion of starter that gets removed as part of its routine maintenance. Sourdough discard is the portion of starter you don't feed during routine maintenance. You can choose to dispose of it or bake with it.

What should I do with my sourdough discard? ›

You can always use this discard by directly mixing it into a dough for baking. Your discard, as long as it's in good shape, will leaven any bread dough just as well. The discard is just like a levain you would make for a recipe. The only difference is it's the same makeup as your starter.

What's the point of using sourdough discard? ›

Culinary-wise, sourdough discard can be used in various recipes such as pancakes, waffles, muffins, sourdough pasta and quick breads like sourdough banana bread to impart a tangy flavor, reduce food waste, and add complexity of flavor to your baked goods.

How to properly dispose of sourdough discards? ›

Place your discard starter in a large bowl and add cold water, stirring to thin it to the consistency of milk; then pour it down the drain, flushing the drain with additional cold water. Will sourdough starter hurt your septic system? No, it shouldn't; it's simply organic matter and yeast.

Do I need to feed sourdough discard before using? ›

Absolutely! A jar of sourdough discard serves as an insurance policy against starter death. If you have some discard on hand, remove a spoonful of it and feed it fresh flour and water in a clean jar. You should have a bubbly starter ready to bake with after a couple of feedings, depending on the discard's condition.

How long is sourdough discard usable? ›

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.

Can you turn sourdough discard into starter? ›

Absolutely! You can take a portion of sourdough discard and add a few grams of flour and a few grams of water to create a healthy active sourdough starter. You may need to feed your revived starter a few more times before its ready to make bread.

Can you feed starters without discarding? ›

You don't have to waste flour on a daily basis if you want to maintain a sourdough starter. By adjusting how much you feed your starter and by choosing discard recipes, you don't have to discard your sourdough starter daily.

Does sourdough discard have to be active? ›

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.

Can I leave sourdough discard out overnight? ›

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.

Can I pour sourdough discard down the sink? ›

You can put your sourdough discard either in the trash. or the compost, or you can use it in recipes. Don't put it down the drain. If you have ever, like, tried to clean out a crusty sourdough starter jar, you know, that stuff turns to, like, basically cement.

How to save sourdough discard for future use? ›

Check out a few of my favorite sourdough discard recipes here. Store it for future baking: You can store sourdough discard in an airtight container in the refrigerator for future baking with sourdough discard recipes. When you're ready to use it, let the discard come to room temperature before using it to bake.

Can I keep adding to my sourdough discard? ›

Can you add sourdough discards together in the same jar? Yes you can add sourdough discards from different days together in the same jar. You just need to make sure you stir it well and you don't leave it sitting in the fridge for too long. Sourdough discard should be used within two weeks.

When should I start saving sourdough discard? ›

If you've just created your sourdough starter, wait until it's reliably rising and falling each day with signs of fermentation—some rise, bubbles, a progressive sour aroma—before storing discard in your cache.

Can I give sourdough discard to a friend? ›

Yes, you can give your friend a portion of sourdough discard to start their own sourdough starter, however it's best if your starter is mature (at least 3 months old) when you do this, so that your friend can start baking straight away.

When has sourdough discard gone bad? ›

Be sure to examine your discard with your senses of sight and smell. If the discard shows spots of discoloration or visible mold growth or if it develops an excessively strong and unpleasant acidic smell, then it should be deemed expired and be thrown away.

Is sourdough discard good for plants? ›

Teaming with good bacteria and microbes your soil and plants will love, your fermented sourdough starter could be the best homemade fertiliser you've ever used! You can use sourdough discard in your garden in the following ways: Use diluted sourdough discard as a liquid nutrient boost.

Where should I store my sourdough discard? ›

Sourdough discard is a wonderful component to many of my daily recipes, but it does occasionally get ahead of me. If you want to avoid wasting that flavorful discard, it can be stored on the counter for 1-2 days, in the fridge for about a week, or even in the freezer for months!

Can I give away sourdough discard? ›

You can either split your starter into a new jar for your friend and feed both as normal ( about 100g of starter and 100g each of water and flour) or spilt some off and give them the discard to feed up. Generally, you don't need more than about 50g of starter to pass on to really get a new starter going.

Can I bake sourdough discard by itself? ›

You can store sourdough discard in a separate container, then bake with it when you want — for instance, maybe you fed your starter on Tuesday, leaving you with discard that you want to use to bake pancakes on Saturday.

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