Sourdough Zucchini Bread Recipe

Sourdough zucchini bread recipe – The best and moistest in the world

You walk through your local green grocers and it’s full of produce. There are so many different things to choose from. There are all these squashes and zucchinis and they look gorgeous, but what do you use them for? Well, I have an idea. This is my recipe for sourdough zucchini bread.

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Where does zucchini bread come from?

The zucchini bread we know and love today started it’s humble beginnings in the late 18th century.

The zucchini bread is a quick bread, which is chemically leavened, and the first commercially available chemical leavener was pearlash. The first published cookbook to use pearlash was the book American Cookery from 1796.

slices of zucchini bread on a wooden board

Pearlash wasn’t for the fainthearted though. You could taste it in the whatever it was put into, and thus lots of spices were added to mask the taste.

Later in the 19th century baking soda was invented in 1846, which requires an acidic ingredient to work. In 1857 baking powder was invented which was even easier to use, because you just needed to add it.

Because both of those are both odor and tasteless, they’ve become the goto leavening for cakes. My recipe also requires baking soda, although I am sure one could be made using sourdough as leavening.

The ingredients in this sourdough zucchini bread recipe

Often zucchini bread is made as a pound cake with added zucchini. I really love banana bread and the texture it brings, so I’ve added banana to my zucchini bread.

a whole zucchini bread on a board

It’s not so much banana that it becomes the primary taste, but it gives it a subtle sweetness that’s not sugary, plus it gives the bread an awesome texture, in my opinion.

If you don’t like (or have) banana, you can substitute the banana with a large egg.

Not all sugars are made the same

When it comes to sugar, there’s a huge difference of what you can get from using the different types available.

In this cake I use a dark brown sugar, you know the really moist kind. The molasses that’s added to the sugar just gives it a distinctive and very complex taste and that really adds to the spices of this cake.

the crust of the sourdough zucchini bread made with this recipe

Additional ingredients?

This is a good base recipe for a zucchini bread.

Depending on what you are looking for you can easily add nuts (walnuts or pecans come to mind). Chocolate chips would also be delicious.

You could also sprinkle some coarse sugar on top to give it a wonderful crunch.

I am sure you can come to with many more great things to add. Feel free to post comments below on your best things to add to this zucchini bread.

The conclusion of this sourdough zucchini bread recipe

Nobody likes dry cake. Least of all Paul Hollywood.

The addition of the zucchini and the sourdough starter, makes this the least dry cake you’ve ever tried. That means that it stays good for many days, if you just store it correctly.

I usually use a ziplock bag, but you can also wrap it tightly in tinfoil and it will keep.

The taste of this bread (or cake) is delicious. The spices are just the right amount, the complexity from the brown sugar and the fermented (but not sour) taste from the starter makes it an absolute treat.

I eat mine with a good layer of butter and a cup of well-brewed coffee. That takes me straight to culinary heaven.

a piece of zucchini bread with delicious butter made from cream from grass fed cows

Please share this recipe for sourdough zucchini bread on social media

This is my recipe for sourdough zucchini bread. If you like the recipe please consider sharing it with like-minded bread lovers on social media.

If you make it and post it on Instagram, please tag me as so I can see it. That would make me very happy.

Sourdough Zucchini Bread

Course: Dessert, Snack
Cuisine: American
Keyword: zucchini, zucchini bread
Prep: 15 minutes
Cook: 1 hour
Total: 1 hour 15 minutes
Servings: 1 zucchini bread
Calories: 3274kcal
Author: Sune Trudslev
Nutrition Facts
Sourdough Zucchini Bread
Amount Per Serving (1 zucchini bread)
Calories 3274 Calories from Fat 1251
% Daily Value*
Fat 139g214%
Saturated Fat 14g88%
Sodium 2463mg107%
Carbohydrates 466g155%
Fiber 13g54%
Sugar 241g268%
Protein 46g92%
* Percent Daily Values are based on a 2000 calorie diet.
A wonderfully moist and full flavored zucchini bread with lots of warm spices and fermented flavor. This is the best zucchini bread recipe you will ever find.
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  • 100 g banana (1 small banana)
  • 225 g brown sugar
  • teaspoon pure vanilla extract
  • 2 large eggs
  • 100 g sourdough discard
  • 250 g all-purpose flour
  • 1 teaspoon cinnamon
  • 1/8 teaspoon nutmeg
  • teaspoon baking soda
  • ¼ teaspoon table salt
  • 60 g milk or non dairy milk
  • 125 g neutral flavored oil
  • 225 g zucchini, grated (1 medium zucchini)


  • Heat your oven to 180°C/360°F.
  • Grate a medium zucchini coarsely and put it in a bowl. You need 250g. Put it aside until you need it.
  • To the bowl of your standmix add: 100g very ripe banana, 225g of brown sugar and tsp vanilla extract.
  • Mix with the paddle attachment until completely combined. The banana should be mostly gone.
  • While mixing add 2 eggs, one whole egg at a time and mix until it's mixed in. Mix a bit longer to get some air into the mixture.
  • Add 100g sourdough starter and mix shortly until combined.
  • Add 250g all-purpose flour, 1 tsp cinnamon, ⅛ tsp nutmeg, 1½ tsp baking soda and ¼ tsp table salt. Mix it together with a whisk.
  • While mixing, add the spiced flour to the batter in two increments. Mix shortly after each addition.
  • Add 60g milk and 125g of neutral flavored oil and mix until it's just combined.
  • Add the grated zucchini on top and fold it in using a spatula.
  • Butter or spray a medium pullman pan, add all of the batter.
  • Put the pan on a wire rack set to the middle position in the oven.
  • Bake for about 60 minutes until a toothpick inserted in the middle comes out clean.
  • Take the bread out of the oven and let it cool in the pan on a wire rack for 15 minutes.
  • Remove the bread from the pan and let it cool completely before serving.
  • Serve with some delicious butter.


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  1. Jonathon Moreira Reply

    Came out perfect, first time!

    How could I do an overnight ferment with this?