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

Do you discard everytime you feed 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.

What happens if you bake sourdough starter 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.

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.

What to do with day 1 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.

Can I feed starter without discarding? ›

Now you have a choice: you can either discard some of it and keep feeding the same amounts you always do and you're left with the same amount of starter you always have. Or you can keep all of it to build it up. However, 1 cup of starter needs more food and water to sustain itself than 1/2 cup starter needs.

Can I leave my sourdough starter out overnight after feeding it? ›

Can I leave my starter out overnight after feeding it? Yes, if you have just fed it.

What is the best way to use sourdough discard? ›

Don't throw it away! Instead, use it to make delicious and nutritious treats like pancakes, waffles, muffins, and bread. Sourdough discard is a great source of natural yeast and flavor, and can add a unique tangy taste to your baked goods.

Does sourdough discard need to be room temperature before baking? ›

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.

How do I know if my sourdough discard is good? ›

The Gray Liquid on Your Discard is Called Hooch

If you see this in your sourdough starter it means your starter is hungry and needs to be fed. It often shows up on discard left in the refrigerator. Pour the hooch into the sink, stir up your discard and use the discard.

Does sourdough discard have to be active? ›

It can be at room temperature or come directly from the fridge. The texture is less bubbly (if bubbly at all) when compared to fluffy active starter. Sourdough discard is not active enough to make bread dough rise, and despite its name the “discard” does not have to be thrown away.

When should you throw out a sourdough discard? ›

It's usually pretty obvious when your starter has gone bad. You will either see mold or discoloration (generally pink or orange). If you see either of these things, you will need to toss your starter. The smell is usually a big give away.

Does sourdough discard add flavor? ›

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.

Do you discard every time you feed sourdough starter? ›

So once your starter has reached maturity, each time you use your starter in making sourdough bread, it is considered "discarding" in that you use it and can then just feed what's left in the jar for your next batch. It's easier to explain using an example. Say you have 120g of starter in your jar.

Can I bake sourdough discard by itself? ›

#3 Sourdough Flavor, No Flour Added

Similar to case #2, above, discarded sourdough is used in recipes with no additional flour called for, so it can be baked immediately. The discarded starter's flour is already fermented and it adds sourdough flavor to the recipe.

Why bake with sourdough discard? ›

Tenderizer: The acidity in sourdough discard weakens gluten development and reacts with chemical leaveners which results in soft and fluffy baked goods. Fermentation: Adding sourdough to baked goods also imparts the magic of fermentation.

Do I feed my sourdough starter after each use? ›

How often you should feed your starter depends on how much you use it during the week. I would keep it in the fridge if you only use a few times a week. A good idea is to feed it every time you use it, leave it on the counter for 8 hours, and then put it back into the fridge until you are ready to use it again.

How do you save a sourdough starter discard? ›

Sourdough Discard is Best Stored in the Fridge

But you'll still want a lid that lets air escape so those gasses don't build up over time! Note: The flavor of your starter will change slightly depending on what temperature it's stored at.

How often do you feed sourdough starter left on the counter? ›

Before using your starter, you may want to feed it every 6 to 12 hours for 24 to 48 hours to get it nice and active. From the counter I like to feed it every 12 hours for 24 hours and then 4 to 6 hours before use. This ensures the best rise and taste in my breads.

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