Sourdough Discard Banana Bread

Don’t discard your extra sourdough starter! It makes a great addition to easy baking recipes, including this banana bread recipe.

sourdough discard banana bread with chocolate chips

It took me a few days to get savvy to why the ‘gram was filling up with sourdough starters.

Since I’m a perpetually busy baker (check out my Healthy Everyday Baking e-book if you don’t believe me), I had a plentiful stash of yeast on hand when the current home isolation hit.

From what I can tell (and this article pretty much confirms it), many would-be bakers found themselves scrambling to buy up all the yeast they could find on store shelves… realizing that weeks/months at home provided a great time to bake.

Here’s the problem. The yeast “food chain” isn’t exactly primed to anticipate a massive baking surge in the spring. And so, much like the story of toilet paper, there’s now a yeast shortage.

(Note: my most recent trip to Publix showed that the only thing completely missing from store shelves that morning was toilet paper and yeast… and I assume hand sanitizer, but I didn’t look.)

So, that leads us to sourdough.

Because of the natural yeast that lives around us every day, with some patience and daily nurturing, you can basically turn flour + water in to a vibrant sourdough mixture that can — eventually — leaven bread all on its own. It’s pretty special when you think about it.

I’m NOT a sourdough expert.

In fact, last week when I reconstituted an Alaskan sourdough starter that I brought back from my last trip to Alaska (be sure to listen to the end of The Supplements Episode to learn more about that) was the first time I’d ever successfully gotten a sourdough starter, started.

sourdough starter discard ideas

But what I’ve found (as any sourdough baker will tell you) is that you end up with A LOT of “discard” as you continually feed your starter. And while yeast is nowhere to be found, flour isn’t far behind from my experience.

In other words, I don’t want to waste a single ounce of flour if I don’t have to. Hence the reason I started searching for sourdough discard recipes.

King Arthur Flour (who by the way has the MOST amazing baking resources ever) has a great guide to sourdough AND has some yummy ideas for sourdough discard recipes. I made their Sourdough Discard Crackers, but if you’ve ever looked through my Instagram feed and my Baking Recipes on here, you know I love me a good quick bread recipe!

So with a little research, my own baking knowledge and a plentiful supply of frozen bananas and chocolate chips, this beauty was born:

sourdough discard banana bread with chocolate chips

If you’re interested in getting started making your own sourdough starter, definitely start with King Arthur Flour’s tutorial.

OR… do like I did. “Cheat” a little and begin with a dry sourdough starter that you can reconstitute. There’s this dry sourdough starter available on Amazon.

King Arthur also has a fresh sourdough starter that I’ve heard wonderful things about (as of 4/8/20 it looks like it’s out of stock). You *might* be able to snag the one I used by purchasing this Sourdough Cookbook (they include a packet of the same starter I used with every purchase of the cookbook).

And lastly, it looks like breadtopia has a dry sourdough starter in stock.

If you bake this recipe or begin your own starter… of if you’re already in the sourdough experience like so many of us, please tag me on Instagram @thisunmillenniallife. I’d love to see what you’re baking! ~Regan


Sourdough Discard Banana Bread with Chocolate Chips

sourdough discard banana bread with chocolate chips

Don’t discard your extra sourdough starter! It makes a great addition to easy baking recipes, including this banana bread recipe.

HOW TO bake this bread without sourdough discard: use an additional 1/3 cup (63 g) all-purpose flour and add in 1/3 (63 g) water to the recipe with the other wet ingredients. 

  • Author: Regan Jones, RDN


  • 2 cups (240 g) all-purpose or cake flour
  • 1/2 teaspoon (3 g) baking soda
  • 1/2 teaspoon (3 g) salt
  • 1/2 cup (100 g) oil
  • 1/2 cup (100 g) lightly packed brown sugar
  • 2 large flax eggs or eggs, if preferred (I actually like this best with homeade flax eggs)
  • 3/4 cup (125 g) sourdough starter discard*
  • 3 very ripe medium-size bananas, mashed
  • 1 teaspoon (4 g) vanilla extract
  • 1 cup (170 g) chocolate chips**


  1. Preheat oven to 350 degrees F. Coat a loaf pan with cooking spray and set aside.
  2. In a medium-size mixing bowl, combine flour, baking soda and salt.
  3. In a separate mixing bowl (or stand mixer) beat oil and sugar until well combined. Beat in eggs, sourdough starter discard, bananas and vanilla.
  4. Gradually beat in flour mixture, scarping down sides of bowl as necessary. Fold in chocolate chips.
  5. Pour batter into prepared pan. Bake for 55 minutes or until wooden pick inserted in center comes out mostly clean. Be careful not to overbake.
  6. Let cool in pan 10 minutes then remove to wire rack to cool completely.


*This is a large amount of “discard.” If you don’t have that much discard, you can supplement with some of your fed starter. I accumulate my daily discard in the fridge to have plenty to bake with when ready.

**If preferred, substitute chopped walnuts or pecans for chocolate chips.

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  1. Britt on August 13, 2020 at 1:01 pm

    Any suggestions on baking time if I use a mini muffin tin? I’m making these for my kids and they prefer mini muffins to the look and feel of a reg loaf.

    • thisunmillenniallife on August 13, 2020 at 1:07 pm

      I’d try one at 15 minutes and see how that works. Do that before baking the whole batch 🙂

  2. Jessica on June 20, 2020 at 11:20 am

    I too discovered King Arthur Flour website this spring, but I went the experimental way and tried their ‘making sourdough starter by graping the flour’ route (with domestic unwashed grapes) and bam, now I’m fridge-deep in starter. I’ve given it away, I’ve baked bread until we’re all 20 lb heavier and I hate discarding discard. So finding recipes to use it instead has been gold.
    I baked this with my toddler (which significantly lengthens all the times listed for prep and cleaning!) and it was gone by nightfall. I suspect the cats, not my husband and kids.
    Anyhow, thanks for the recipe and I will be sure to check the blog out (fellow through-the-cracks Gen Xer here)

    • thisunmillenniallife on June 22, 2020 at 7:17 am

      Always good to meet a fellow GenXer 🙂 Glad you enjoyed the bread! And VERY cool about the method you used for your Starter. ~Regan

  3. Meggie on June 11, 2020 at 4:06 pm

    Is this for one loaf or two? I made it as one and it is still very gooey after an hour of baking. It is also risen almost 2” above the bread pan.

    • Meggie on June 11, 2020 at 4:44 pm

      So after completing baking (Took about 1hr 7mins) and tasting we give this bread 5 stars! Super moist and a little more bread-like then most banana breads (which I prefer!)

  4. Chris on May 29, 2020 at 7:31 am

    The Sourdough Discard Banana Bread is a staple in our house – so much so that now as we’re running out (in a day or two, max) our girls are asking when we’re making the next batch. Thanks for creating and sharing this recipe Regan! It’s easy, has excellent texture and most importantly, it’s tasty! I encourage anyone who’s considering making banana bread – this recipe is the best!

    • thisunmillenniallife on May 29, 2020 at 8:01 am

      My family feels the same way, Chris. Glad you all enjoy it!! ~Regan

      • Meggie on June 11, 2020 at 4:45 pm

        So after completing baking (Took about 1hr 7mins) and tasting we give this bread 5 stars! Super moist and a little more bread-like then most banana breads (which I prefer!)

        • thisunmillenniallife on June 12, 2020 at 5:37 am

          Oh yay! I’m SO glad. My family, too, really enjoys this as a different way to enjoy banana bread. I’ve heard so much good feedback from everyone who’s made it. (And Sorry for the delay in responding to your first comment.) Thanks for the rating!

  5. Sally @ Real Mom Nutrition on May 24, 2020 at 1:18 pm

    Perfect way to use sourdough discard! This bread is rich and full of chocolate. My gang loved it.

    • thisunmillenniallife on May 27, 2020 at 8:03 am

      Thanks Sally! So glad your family liked it.

  6. Elana on May 24, 2020 at 12:26 pm

    I’ve made this twice already and will definitely be making it more! Delicious banana bread and I love that it uses a large amount of starter discard!

    • thisunmillenniallife on May 27, 2020 at 8:03 am

      Yes! I hate wasting starter, too! So glad you’re enjoying the recipe. ~Regan

  7. Marie Moser on May 24, 2020 at 11:24 am

    This banana bread recipe was awesome. The texture was dense but moist. The banana flavor was spot on and the addition of chocolate chips can never be wrong! Thanks for this great recipe.

    • thisunmillenniallife on May 27, 2020 at 8:04 am

      Totally agree. Chocolate Chips are always a good idea 🙂 So glad you enjoyed it, Marie. ~Regan

  8. Kelly on May 24, 2020 at 8:51 am

    This recipe was such a hit in my house! I never wanted to throw away my discard, so made this a few times while growing my starter. It was the perfect texture and sweetness with a super subtle sour note that added some dimension. 10/10 recommend!

    • thisunmillenniallife on May 27, 2020 at 8:05 am

      Thanks Kelly! So glad it was a hit 🙂 ~Regan

  9. Deborah on May 14, 2020 at 3:48 pm

    I just made this and it’s fantastic and extremely easy to make. I used what I had on hand: regular eggs and coconut sugar. Excellent results with a surprisingly light texture and nice crust. A keeper!

    • thisunmillenniallife on May 16, 2020 at 6:12 am

      I’m so glad, Deborah! Thanks for rating and leaving a comment. I really appreciate it. ~Regan

    • Katherine on September 21, 2020 at 10:40 pm

      I’ve made this a few times and a now firm family favourite. Today when making I was reaching for the chocolate chips when I saw dried dates. I chopped up a cups worth, softened with a little boiled water while made the rest of the recipe and then added instead of chocolate chips along with 1/2 teaspoon of cinnamon. Yum

      • thisunmillenniallife on September 22, 2020 at 5:14 am

        That substitution sounds delicious!! So glad you and your family are enjoying this recipe 🙂 ~Regan

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