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

/ Updated Sep 17, 2021 / by Carolyn Gratzer Cope / 4 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. Heather W. says

    Hello. I'm new to SD. We use SD recipes for its properties with gluten degradation for a gluten sensitivity. It is my understanding that the degradation occurs during the fermentation process. I would like to try this banana bread. Is it possible to somehow long ferment this batter? I wouldn't think I could leave the batter out on the counter long because of the eggs. If I mixed the active starter with everything except the baking soda and eggs and left it on the counter to ferment for 6 hours or so would this be okay for this recipe? Would I also wait with the salt? Seems like a lot of recipes leave the salt off until the end, though I don't understand why. What about the bananas? Would it be safe to add the bananas at the beginning or could I add them in with the eggs? Thank you for any help you can offer me.

    Reply

  2. Chari says

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

    Reply

  3. 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

Leave a Reply

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

FAQs

How much of your sourdough starter should you discard? ›

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.

What is the secret to a good sourdough starter? ›

Over the years, I've found keeping the mixture warm at around 80°F (26°C), and high hydration (100% water to flour in baker's percentages) helps get things started. In addition, while not mandatory, using certain flour also helps increase the chances a starter will take hold quickly (see below).

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.

How to tell if sourdough starter is bad? ›

Typical signs of food spoilage and mold include pink, orange, or green colors, white fuzzy spots, or sometimes areas that are darker with white areas on top. If you see any of these signs, I would recommend throwing your starter away and creating a new one.

How long can you keep sourdough discard before it goes bad? ›

Sourdough discard only lasts a day or two at room temperature. 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.

What happens if you forgot to discard half of your sourdough starter? ›

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.

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.

How often should I stir my sourdough starter? ›

It is important that you stir the sourdough starter every day in the morning and in the evening. Feed the starter. Add 60 g flour and 60 g lukewarm water, stir well to combine, and let sit out for 24 hours.

How to increase the strength of sourdough starter? ›

By using a technique known as “Peak-to-Peak” feeding, you should ignore the clock and feed your starter shortly after it peaks. By doing this three or four times in a row, you can substantially grow your yeast population and strengthen your starter.

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.

How soon can you start using 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 I start another sourdough starter with my discard? ›

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?

What is the black hooch on my sourdough starter? ›

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.

Should I pour the hooch off my sourdough starter? ›

If your sourdough starter forms hooch, mix the hooch back into the starter before you discard and feed. The only time I would consider pouring the hooch off your sourdough starter is if it has been stored in the fridge for a long time and the hooch is very dark.

What is the minimum amount of sourdough starter to keep? ›

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.

Should I discard liquid on top of sourdough starter? ›

A clear liquid on top of a starter that has vigorously risen and fallen and was covered with bubbles (which have subsided) is hooch. If you see hooch on your starter, discard and refeed. A clear liquid on top of a starter that has not vigorously risen and fallen is water separation.

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.

Should I stir my sourdough starter between feedings? ›

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.

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