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Sourdough Discard

Sourdough Discard Zucchini Carrot Bread with Pistachios

You’ll love this light and fluffy Sourdough Discard Zucchini Carrot Bread with pistachios and an icing drizzle for perfect sweetness and texture.

Prep: 15 minutes
Cook: 1 hour
Total: 1 hour 15 minutes
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Recipe Index | Ferment | Sourdough Discard

Sourdough Discard Zucchini Carrot Bread with Pistachios

You’ll love this light and fluffy Sourdough Discard Zucchini Carrot Bread with pistachios and an icing drizzle for perfect sweetness and texture.

Zucchini Carrot Bread Ingredients

This zucchini carrot bread batter is very similar to muffin batter. It’s super easy to mix. The key is to mix all the dry ingredients separately from the wet ingredients before combining. You also want to ensure your wet ingredients are the right temperature before mixing them together!

baked zucchini carrot bread on a cooling rack with icing drizzled on top and dripping down the sides.

The Best Bread Pan for Zucchini Carrot Bread

I picked up this fantastic non-stick bread pan at Whole Foods, and I LOVE it. It’s perfect for any bread. Click here to get one.

For this recipe, it’s best to use a non-stick metal bread pan close to a 9x5x3 dimension. Here are a few more options I’d recommend:

  • Caraway Ceramic Bread Pan
  • USA Pan 1-pound loaf pan
  • Cuisinart Loaf Pan

Should you squeeze the water out of zucchini for bread?

In some recipes, you may need to, but in this recipe, you don’t!

In some quick sweet bread recipes, you might not need to squeeze the water out of zucchini for several reasons:

  1. Moisture Balance: I designed my recipe to accommodate the additional moisture from the zucchini. The zucchini’s moisture content can help create bread that is exceptionally moist and tender.
  2. Recipe Formulation: The amount of dry ingredients (like flour and sugar) in these recipes may be adjusted to account for the extra liquid from the zucchini. This ensures the batter has the correct consistency and the bread bakes properly.
  3. Desired Texture: Some zucchini bread recipes aim for a very moist, almost cake-like texture. The zucchini’s water content contributes to this texture, making the bread soft and tender.
  4. Simplicity and Convenience: Not squeezing the zucchini simplifies the recipe, making it more straightforward and quicker to prepare. 

Should zucchini be peeled before shredding for bread?

No, you shouldn’t peel the zucchini before grating it and incorporating it into the bread. I prefer to leave the skin on for fiber, but also for a pop of color inside the bread.

The zucchini skin is perfectly healthy, especially if you use organic zucchini. So skip the extra work and leave it on! Your bread will be prettier with it.

Don’t Over-Mix the Zucchini Carrot Bread Batter!

When making quick bread one crucial tip is to avoid overmixing the batter. Overmixing can result in dense bread rather than a light and fluffy loaf. The reason behind this lies in the formation of gluten.

Gluten, a protein present in flour, gives structure to baked goods. However, excessive mixing develops gluten strands, leading to a denser texture. To prevent this, gently mix the dry and wet ingredients until just combined, ensuring there are still some lumps and streaks of flour in the batter.

This technique allows the carrot zucchini bread to rise correctly, resulting in a tender crumb and a delightful eating experience.

My other quick bread baking tip is always to use a great, non-stick metal loaf pan.

More Discard Recipes to Try

  • Peach Cobbler Muffins with Brown Sugar Crumble
  • Sourdough Lemon Blueberry Cookies (Blueberry Muffin Cookies)
  • Sourdough Carrot Cake Banana Bread
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Sourdough Discard

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Sourdough Discard Zucchini Carrot Bread with Pistachios

You’ll love this light and fluffy Sourdough Discard Zucchini Carrot Bread with pistachios and an icing drizzle for perfect sweetness and texture. This bread is ideal for any spring or summer get-together. Pair it with coffee or tea for a lovely afternoon snack.

  • Prep: 15 minutes
  • Cook: 1 hour
  • Total Time: 1 hour 15 minutes

Ingredients

  • 2 cups all-purpose flour
  • 1/2 cup sugar
  • 1/2 teaspoon baking soda
  • 1 teaspoon baking powder
  • 2 tablespoons potato starch
  • 1 teaspoon salt
  • 1 teaspoon cinnamon
  • 1/2 tsp ground ginger
  • 1/2 cup crushed pistachios
  • 1/2 cup carrots, grated
  • 1/2 cup zucchini, grated
  • 1/2 cup unsalted butter, room temperature soft
  • 1/2 cup sourdough starter, room temperature
  • 1 teaspoon vanilla extract
  • 1/2 cup whole milk, room temperature
  • 2 eggs, room temperature

Icing

  • 1/3 cup powdered sugar
  • 2–3 teaspoons whole milk
  • crushed pistachios

Instructions

  1. Preheat your oven to 350° F.
  2. Grease a non-stick, 5×9 (1-pound) bread pan with butter.
  3. Grate and measure out the carrot and zucchini.
  4. In a medium-large mixing bowl, combine the flour, potato starch, sugar, baking soda, baking powder, salt, cinnamon, ginger and pistachios.
  5. In a separate bowl, combine the carrots, zucchini, butter, sourdough starter, vanilla, whole milk, and eggs. Mix the wet ingredients until evenly combined.
  6. Gently fold the wet ingredients into the dry ingredients until everything is just combined. Do not over-mix. The batter should be thick, and it’s okay if there are some dry clumps.
  7. Scoop the batter into the bread pan.
  8. Bake for 40-50 minutes total. Rotate the pan halfway through.
  9. While the bread bakes, mix the icing together. Add the milk 1 teaspoon at a time, keeping the icing super thick but able to be drizzled. Crush or chop some pistachios to sprinkle on top the icing.
  10. Allow cooling for about 15 minutes in the pan, then slide the loaf out of the pan onto a cooling rack, allowing it to cool completely.
  11. Drizzle with icing and top with crushed pistachios.

Did you make this recipe?

Please leave a 5-star review below if you loved it! Tag @cultured.guru on Instagram

 

Nutrition information is auto-calculated and estimated as close as possible. We are not responsible for any errors. We have tested the recipe for accuracy, but your results may vary.

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Kaitlynn Fenley Author, Educator, Food Microbiologist
Kaitlynn is a food microbiologist and fermentation expert teaching people how to ferment foods and drinks at home.
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  1. Leah
    04|03|2024

    Could I use corn starch instead of potato starch? Or would you just leave it out?

    Reply
    1. Kaitlynn Fenley
      04|03|2024

      yes! that’s a fine substitute

      Reply
  2. Patty
    04|08|2024

    This sounds good, and I’d like to try it. However, can this, and your other bread recipes, be made with gluten-free flour? I have to be gluten-free.

    Reply
    1. Kaitlynn Fenley
      04|10|2024

      this bread can be made with GF flour, since it is a quick bread recipe. My other sourdough recipes that require kneading and rising cannot be made with GF flour.

      Reply
  3. Tracy
    08|14|2025

    I dont keep potato starch or corn starch around. What is the purpose and is there a non-GMO substitute? I use tapioca flour or arrowroot starch to thicken, but is the purpose of potato starch, too? Thanks for your help!

    Reply

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A lot of people think vinegar kills all microbes b A lot of people think vinegar kills all microbes because shelf stable pickles do not contain microbes. But with shelf stable pickles, it’s the pasteurization/sterilization via hot water bath or pressure canning that makes shelf stable pickles free of microbes.

Hot hot hot acid in a pressurized environment does kill, well…most microbes. 

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Fridge pickles are made without pasteurization/sterilization (canning) so they will wild ferment without refrigeration, and not necessarily in a good way because there’s not enough salt. 

All vinegar is made via fermentation too, and vinegar fermentation involves acetic acid bacteria, but also a ton of LAB, mainly Lactobacillus, Pediococcus, and Leuconostoc (the same genera you’d find in fermented veg.)  I linked a reference paper in my fermented mushroom recipe blog, so you all can read about the LAB involved in vinegar fermentation. 

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But it was a conduit for learning. Those beets were my first lesson in how different sugars and growth in the rhizosphere vs the phyllosphere influences fermentation. 

Cabbage and the cabbage microbiome offer a lot to balance out beets in fermentation, and I think mixing into a sauerkraut is the only way to go for lacto fermenting beets! 

Try googlin’ “beet and red cabbage sauerkraut” and you’ll see my recipe, I’m Cultured Guru.
Squash is the secret ingredient! My Roasted Butte Squash is the secret ingredient!

My Roasted Butternut Squash Hot Sauce recipe is free on my website! I didn’t cook this one, so yes it’s still probiotic.

When lactic acid bacteria ferment the starches in winter squash, they naturally convert them into emulsifying compounds called exopolysaccharides. So when we blend our hot sauce after fermentation, there’s no watery separation in the bottle. Roasting the squash with the garlic for the recipes also adds such good flavor! 

Definitely make sure it’s fully fermented and not bubbling anymore before you blend and bottle. Otherwise, it’ll carbonate in the cute little hot sauce bottles.

#hotsauce
Myth Busting: Yes, the SCOBY IS the pellicle! Plee Myth Busting: Yes, the SCOBY IS the pellicle! Pleeeease stop saying it’s not. 😌



Watch till the end, I show you how to grow one!



This is a little tidbit from what I teach in the Kombucha lesson in our Fermented Drinks Semester online course!

I also share this recipe FOR FREE just ✨GOOGLE✨ “cultured guru SCOBY” and you’ll see my full recipe with the perfect sugar to tea ratios for growing, feeding and maintaining a kombucha SCOBY.

#kombucha
And the knife stays in the box. GOOGLE “sourdoug And the knife stays in the box. 

GOOGLE “sourdough king cake” my recipe is the first one! 👑☂️💚✨

If you’re like me and prefer from scratch, homemade everything, you’ll definitely want to try this king cake for Mardi Gras! I used organic naturally dyed sprinkles and all that jazz too. 

If you just search “sourdough king cake” on google you’ll see my recipe, it’s usually the first one. 

My main tips for making this:
✨use a very active starter or throw in some instant yeast with your starter
✨make sure the dough is actually proofed before shaping it. If it’s cold in your house it will take longer. 
✨please follow directions! You can cold ferment the dough in the fridge after it doubles in size and BEFORE filling and shaping.

🎵Song is Casanova by Rebirth Brass Band
Fermentation is a gift from the microbes of this e Fermentation is a gift from the microbes of this earth.

When we had a food business, I could never shake the feeling that fermentation is not meant to be sold to you from a fluorescently lit grocery shelf in an endless cycle of waste. Fermentation is meant to be cultivated in your home, with your hands, with intention and love in a sustainable, grateful practice of reciprocity and nourishment. 

This is the story of how we got here. 

After so many lessons learned, our small fermentation business is now value aligned, peaceful, fulfilling, and happy.  It often seems like the gut feelings (the microbes within us) guided us in the right direction. To teach. 

You can learn for free on our blog, or you can enroll in our online courses (we extended our new year sale!) Either way, with me as your teacher, you’ll learn to adopt a holistic perspective on the microbial ecosystems that influence our food, lives, and the planet.
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