Sourdough Zucchini Bread Recipe
This sourdough zucchini bread turns tangy discard and garden zucchini into a moist, cinnamon-spiced loaf that tastes like summer baking at its coziest.
The Best Way to Use Your Sourdough Discard This Summer
If you have been feeding a sourdough starter all year, chances are you have a jar of discard sitting in the fridge wondering what its purpose is. And if your garden or farmers market has handed you an avalanche of zucchini, this recipe solves both problems at once. This sourdough zucchini bread is moist, faintly tangy, and warmly spiced with cinnamon, and it turns two humble ingredients into something genuinely special.
This is one of those sourdough summer recipes that feels like it was made for the season. It is also one of the easiest quick sourdough breakfast recipes you can put together, since there is no proofing or waiting on yeast, just mix, pour, and bake.
Before we get cooking, the right tools and ingredients make a real difference here. A sturdy loaf pan and a good box grater will save you time and give you a more even bake, and using fresh baking soda and baking powder ensures your loaf actually rises the way it should. These are the products that genuinely help this recipe shine:
Why Sourdough Discard Works So Well in Zucchini Bread
Unfed sourdough discard is not just a way to reduce waste, it actually improves the texture and flavor of quick breads. The natural acidity in the discard reacts with the baking soda to help the loaf rise, while also giving the crumb a subtle tang that balances the sweetness of the sugar and the earthiness of the zucchini.
This recipe is part of a growing world of sourdough recipes healthy bakers love, because it lets you use up discard without needing a second starter feeding or a full day of waiting. If you are building a rotation of recipes using sourdough discard, this loaf deserves a permanent spot.
Chef's Tip: Do not worry if your discard is a few days old or a little bubbly and sour smelling, that is exactly what you want here. The tangier the discard, the more complex the flavor of the finished bread.
The Zucchini Prep Step You Cannot Skip
Zucchini holds an enormous amount of water, and if you skip wringing it out, your bread will turn dense and gummy instead of tender. After grating your zucchini, place it in a clean kitchen towel or a few layers of paper towel and squeeze firmly over the sink until the liquid stops running out. It feels like overkill, but it makes all the difference.
This step is what separates an average zucchini recipe from a truly great one, and it is worth the extra two minutes every single time.
Mixing, Baking, and Getting That Perfect Crumb
The method here follows the classic quick bread formula: whisk your wet ingredients, whisk your dry ingredients separately, then fold them together gently. Overmixing develops gluten in the flour, which can make the loaf tough and rubbery instead of soft and tender.
Walnuts are optional but highly recommended if you like a little crunch against the soft crumb. Chocolate chips also work beautifully if you want to lean into dessert territory rather than breakfast.
Ready to make it? Here is the full step-by-step recipe:
Sourdough Zucchini Bread Recipe
This sourdough zucchini bread turns tangy discard and garden zucchini into a moist, cinnamon-spiced loaf that tastes like summer baking at its coziest.
Ingredients
- 1 3/4 cups all-purpose flour, spooned and leveled
- 1 cup sourdough discard, unfed, straight from the fridge is fine
- 1 1/2 cups zucchini, grated, excess moisture squeezed out
- 3/4 cup granulated sugar
- 1/4 cup brown sugar, packed
- 1/2 cup vegetable oil, or melted coconut oil
- 2 large eggs, room temperature
- 1 tsp vanilla extract
- 1 1/2 tsp ground cinnamon
- 1 tsp baking soda
- 1/2 tsp baking powder
- 1/2 tsp salt, fine sea salt
- 1/2 cup walnuts, chopped, optional
Instruction
Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x5 inch loaf pan and line it with parchment paper, leaving an overhang on the sides.
In a large bowl, whisk together the sourdough discard, granulated sugar, brown sugar, vegetable oil, eggs, and vanilla extract until smooth and well combined.
Fold in the grated zucchini until evenly distributed.
In a separate bowl, whisk together the flour, cinnamon, baking soda, baking powder, and salt.
Add the dry ingredients to the wet mixture and fold gently just until no streaks of flour remain. Do not overmix.
Fold in the chopped walnuts, if using.
Pour the batter into the prepared loaf pan and smooth the top with a spatula.
Bake for 55 to 65 minutes, until a toothpick inserted into the center comes out clean or with just a few moist crumbs.
Let the loaf cool in the pan for 15 minutes, then lift it out using the parchment overhang and transfer to a wire rack to cool completely before slicing.
Equipment
- 9x5 inch loaf pan
- Parchment paper
- Box grater
- Large mixing bowl
- Whisk
- Wire cooling rack
Notes
Storing, Freezing, and Serving Ideas
Once your loaf has cooled completely, wrap it tightly in plastic wrap or store it in an airtight container. It keeps beautifully at room temperature for a few days, and it freezes exceptionally well if you want to stash a loaf for later.
- Slice and freeze individual pieces for quick, grab and go breakfasts
- Toast slices lightly and spread with butter or cream cheese
- Crumble leftover bread over yogurt for a fun textural topping
This loaf is proof that some of the best sourdough loaves are not the crusty artisan kind at all, sometimes the most rewarding bake is a humble, spiced quick bread that uses up what is already in your kitchen. Whether you are working through a backlog of sourdough discard ideas or just trying to use up zucchini before it takes over your counter, this recipe is a delicious way to do both.
