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

/ Updated Sep 17, 2021 / by Carolyn Gratzer Cope / 3 Comments / This post may contain affiliate links. Learn more.

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Our chocolate chip banana bread has been flying off the shelves worldwide for over a decade. I adapted that recipe into sourdough banana bread — a classic, tender, delicately flavored quick bread that doubles as an easy way to use up sourdough discard (unfed starter).

Sourdough Banana Bread (Starter Discard Recipe) - Umami Girl (1)

Why we love this recipe

The sourdough process has so much to recommend it. But one challenge — especially when you're in the process of creating a new sourdough starter — is using the unfed portion (also called discard) instead of wasting it.

This wonderful, classic-tasting banana bread recipe is a great way to use it. This bread is:

  • Tender
  • Delicately flavored
  • Mixed with a single fork in a single bowl
  • Ready in about an hour

What you'll need

Here's a glance at the ingredients you'll need to make sourdough discard banana bread.

Sourdough Banana Bread (Starter Discard Recipe) - Umami Girl (2)
  • Use extremely ripe bananas. Fresh or frozen and defrosted are both fine.
  • You can use whatever 100% hydration sourdough starter you have. Mine is made with hearty rye flour, and the banana bread still turns out delicate and mild. The purpose of this recipe is to hep use up unfed starter (sourdough discard), but you can also use ripe, bubbly starter. The bread will rise a little more if you do that.
  • If you like, you an add half a cup of chopped walnuts and/or half a cup of chocolate chips.

How to make it

Here's what you'll do to make a great loaf of sourdough banana bread. You can see the steps in action in the video that accompanies this post, and get the all the details in the recipe card below.

Sourdough Banana Bread (Starter Discard Recipe) - Umami Girl (3)
  1. In a large mixing bowl, mash the bananas well. Add the sourdough starter and mix it in. (You can use a fork to mix the whole recipe.)
  2. Stir in the melted butter, then crack the eggs into the bowl and mix until well-incorporated. Stir in the brown sugar and vanilla.
  3. Sprinkle the baking soda and salt evenly over the mix and then tip in the flour. Mix until combined.
  4. Pour batter into a greased, medium-sized loaf pan (see recipe card below for dimensions). Bake in the center of a 350°F oven for about 55 minutes. A tester inserted into the bread won't come out totally clean because of the banana, but it shouldn't be covered with batter.
Sourdough Banana Bread (Starter Discard Recipe) - Umami Girl (4)

Expert tips and FAQs

Can you taste the sourdough in this banana bread?

Honestly? It just tastes like banana bread, with perhaps the slightest bit of additional tang — even though my starter is made from hearty whole grain rye flour. The acidity of the starter contributes to a tender crumb, but since we bake the bread right after mixing, the dough doesn't have a chance to ferment.

What if my starter isn't 100% hydration?

This recipe uses half a cup (112 grams) of 100% hydration starter, which is 56 grams of flour and 56 grams of water. If your starter has a different hydration level, you can do the math. Add enough starter to contribute 56 grams of flour, along with additional water to make up the difference.

How long does sourdough starter banana bread keep?

Once completely cool, this loaf will keep well for three or four days wrapped in foil at room temperature. You can toast slices of it on subsequent days. For longer-term storage, wrap in foil, place into a zip-top freezer bag, and freeze for up to about six months.

More sourdough resources

  • Rye sourdough starter
  • My favorite crackers for using unfed starter
  • Scallion pancakes (discard recipe)
  • The perfect loaf of sourdough rye bread
  • Life-changing sourdough bagels
Sourdough Banana Bread (Starter Discard Recipe) - Umami Girl (5)

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Yield: 12

Sourdough Banana Bread

Sourdough Banana Bread (Starter Discard Recipe) - Umami Girl (6)

Our super-popular banana bread with chocolate chips has been a favorite of many families for over a decade. For times when you have an abundance of unfed sourdough starter, I developed this adaptation to merge the best of all possible worlds.

Prep Time10 minutes

Cook Time55 minutes

Total Time1 hour 5 minutes

Ingredients

  • 1 pound (454 grams) very ripe bananas (3 to 4 large, weighed with skins still on)
  • ½ cup (112 grams) unfed 100% hydration sourdough starter
  • 4 tablespoons (56 grams) butter, melted
  • 2 large eggs
  • ½ cup (100 grams) lightly packed brown sugar
  • 2 teaspoons vanilla extract
  • 1 teaspoon baking soda
  • ¼ teaspoon fine sea salt
  • 1 ¼ cups (150 grams) all-purpose flour

Instructions

  1. Preheat the oven to 350°F with a rack in the center. Grease a medium (8-cup/9 x 5 x 3 inch) loaf pan.
  2. In a large bowl, mash the bananas with a fork.
  3. Mix in the sourdough starter.
  4. Mix in the melted butter.
  5. Crack the eggs into the bowl and mix well.
  6. Add the brown sugar and vanilla and mix with the fork to combine well.
  7. Sprinkle the baking soda and salt over the batter.
  8. Add the flour and mix with the fork until just combined.
  9. Pour the batter into the loaf pan and bake for about 55 minutes, until a tester inserted in the center comes out with only banana on it, not raw batter.
  10. Cool in the pan on a rack for ten minutes, then remove from pan to cool completely.

Notes

  1. You can use refreshed (fed) sourdough starter if you like. The bread will rise a little more.
  2. When possible, it's best to weigh your ingredients for baking. If you don't have a kitchen scale, use the spoon and level method to measure the flour.
  3. If you like, you can add ½ cup chopped walnuts and/or ½ cup chocolate chips to the batter after mixing in the flour.
  4. Once completely cool, store any leftovers at room temperature, wrapped in foil, for up to four days. You can toast slices in subsequent days if you like. For longer-term storage, wrap well in foil, place inside a zip-top freezer bag, and freeze for up to about six months.

Nutrition Information:

Yield:

12

Serving Size:

1

Amount Per Serving:Calories: 127Total Fat: 1gSaturated Fat: 0gTrans Fat: 0gUnsaturated Fat: 1gCholesterol: 31mgSodium: 163mgCarbohydrates: 26gFiber: 2gSugar: 9gProtein: 3g

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More Sourdough

  • Sourdough Scallion Pancakes
  • Sourdough Rye Bread
Sourdough Banana Bread (Starter Discard Recipe) - Umami Girl (11)

About Carolyn Gratzer Cope

Hi there, I'm Carolyn Gratzer Cope, founder and publisher of Umami Girl. Join me in savoring life, one recipe at a time. I'm a professional recipe developer with training from the French Culinary Institute (now ICE) and a lifetime of studying, appreciating, and sharing food. More about me.

Reader Interactions

Comments

  1. Chari says

    Sounds yummy. If I make 3 smaller loaves can you tell me how long they should bake? 46 min.?
    Thanks

    Reply

  2. Julie says

    Can I fix this and let the dough rest in the fridge overnight? To help the starter incorporate?

    Reply

    • Carolyn Gratzer Cope says

      Hi, Julie! There's no need to let the starter incorporate more than it would with a normal mixing process, but you can make the batter in advance if you'd like, as long as you follow a few tips. First, baking soda needs to be added shortly before baking, so don't mix it in until the last minute. Second, the longer the batter rests in the fridge, the more pronounced any sourdough flavor will be. This is especially true if you're using active starter but still applies to a lesser degree with discard. If you follow these guidelines it's fine to let the batter chill overnight, but you'll notice a bit more tang in the final result.

      Reply

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

FAQs

Can you do anything with sourdough starter 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.

Is sourdough starter discard healthy? ›

Sourdough discard recipes not only reduce waste but also offer health benefits, making them a wonderful addition to a balanced diet. The fermentation process of the sourdough starter increases the availability of certain nutrients and can help improve digestion.

What is the difference between sourdough starter and discard? ›

Active starter and discard both come from the same sourdough starter. However, they are in different phases. Active starter has been fed flour and water within the last 12 hours or so and is growing until it hits its peak. Once it begins to fall it is considered discard.

When should I start discarding sourdough starter? ›

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.

How to tell if sourdough discard is bad? ›

Visible Mold Any mold regardless of color indicates that the starter is contaminated and should be discarded. Consistently Poor Performance If the starter doesn't rise bubble or double in size after feeding it may have weakened yeast or a microbial imbalance.

Can you use a day 1 sourdough discard? ›

Remember, you can't use the discard from your homemade sourdough starter for the first 7 days. You can use sourdough discard in all kinds of sourdough discard recipes, including these no wait sourdough recipes, overnight sourdough discard recipes and sourdough discard recipes that use up a lot of discard.

Can you use 2 day old sourdough discard? ›

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.

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 you use sourdough discard straight from the fridge? ›

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.

What is the best container for sourdough discard? ›

Ideally, you should use a medium sized, clear glass jar with a lid that can be loosely rested or screwed on tight. At a glance, the best sourdough starter jar should be: Medium sized. Clear or transparent.

Why bake with sourdough discard? ›

What are the Benefits of Sourdough Discard in a Baked Good?
  • Less Waste: Many people, myself included, don't like wasting the discard. ...
  • More Moisture: Adding discard to recipes adds extra moisture to the baked good.
Sep 23, 2023

Can you use an active sourdough starter instead of discarding? ›

Absolutely you can! Active starter can be used in the same way as sourdough discard in sweet or savory baking.

Does sourdough starter get better the older it is? ›

While the age of your starter won't make your bread any better — turns out, only good sourdough practices can do that — it's a link in the long legacy of sourdough, one of the oldest forms of baking that exists. Whether your starter is a week or a decade old, you can become part of that lineage as well.

Why is my sourdough starter bubbling but not rising? ›

If your starter gets completely covered on top with bubbles but does not rise, it is healthy but may just be a wet mix. Try reducing the water in your next feeding and see if you have different results. Also, the type of flour you are using can impede the rise of your starter.

What is the healthiest flour for sourdough bread? ›

Compared to whole wheat flour, rye flour is said to be the most nutrient- and amylase-dense option for a sourdough starter. Overall, it has a lower gluten protein content than wheat flour, which means it produces slack, sticky, and dense doughs.

How long is sourdough starter discard good for? ›

Best practice is to use the discard within 3-4 weeks, but if left longer it is okay. It just becomes more broken down and sour over time.

How long can sourdough starter discard sit out? ›

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 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 chickens eat sourdough discard? ›

You can feed unused sourdough starter (sourdough discard) to your chickens. It's a great way to introduce fermented foods into their diet and a better alternative than yoghurt (chickens aren't good with dairy).

References

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