Blueberry Zucchini Bread Recipe

This blueberry zucchini bread recipe makes one moist 9-by-5-inch loaf with 150 g blueberries, 180 g grated zucchini, and a tender oil-based crumb. For the best texture, use a blender only for the wet ingredients, fold in the flour by hand, and stop mixing as soon as no dry streaks remain.

The recipe works in a standard metal loaf pan, an 8-by-4-inch pan for a taller loaf, or three mini loaf pans. Frozen blueberries can be used without thawing, and lightly squeezing the zucchini prevents a soggy center without removing all of its moisture.

Blueberry Zucchini Bread at a Glance

Ingredients

• 240 g all-purpose flour, approximately 2 cups
• 1 teaspoon baking powder, 4 g
• 1/2 teaspoon baking soda, 2.5 g
• 3/4 teaspoon fine salt, 4 g
• 1 teaspoon ground cinnamon, 3 g
• 150 g granulated sugar, 3/4 cup
• 110 g neutral oil, 1/2 cup
• 2 large eggs, approximately 100 g without shells
• 80 g plain yogurt, 1/3 cup
• 1 teaspoon vanilla extract, 5 g
• 180 g grated zucchini, about 1 1/2 cups loosely packed before squeezing
• 150 g blueberries, 1 cup fresh or frozen
• 1 tablespoon flour, 8 g, for tossing the blueberries

For an optional finish, reserve 20 g of the blueberries for the top and sprinkle 1 tablespoon of coarse sugar over the batter before baking. The coarse sugar adds a crisp surface but is not necessary for the loaf to rise.

Choose the Right Loaf Pan

These times assume a light-colored metal pan. Dark metal and glass can brown the edges faster, so begin checking 5 minutes early and loosely cover the top with foil if it becomes deeply brown before the center is baked. Fill any pan no more than two-thirds full; if your pan is smaller than the options above, bake the excess batter as muffins.

How to Make Blueberry Zucchini Bread

1. Prepare the oven, pan, and zucchini

Heat the oven to 175°C / 350°F. Grease a 9-by-5-inch loaf pan and line it with a parchment sling, leaving paper over the two long sides so the cooled loaf can be lifted out.

Coarsely grate about 225 g zucchini to produce approximately 180 g after a light squeeze. Place it in a clean towel or several layers of paper towel and press gently. You want the zucchini damp, not dry: removing every drop of liquid makes the bread less moist, while leaving a large pool of liquid can create a gummy center.

2. Combine the dry ingredients

In a medium bowl, whisk together 240 g flour, 4 g baking powder, 2.5 g baking soda, 4 g salt, and 3 g cinnamon. Whisking distributes the leaveners more evenly than adding them separately to the batter.

Measure 150 g blueberries and toss them with 8 g flour. This thin coating helps reduce sinking and absorbs some berry juice during baking. If using frozen berries, keep them frozen until the moment they are folded in.

3. Mix the wet ingredients

In a large bowl, whisk or blend together 150 g sugar, 110 g oil, 2 eggs, 80 g yogurt, and 5 g vanilla until smooth. Add the squeezed zucchini and stir it in.

For a blender-friendly method, put the sugar, oil, eggs, yogurt, and vanilla in a blender jar. Blend on low for 5–8 seconds, just until combined. Transfer the mixture to a bowl before adding zucchini. Do not blend the flour or blueberries: the blender’s blades develop gluten quickly and can turn a soft quick bread dense and chewy.

4. Fold the batter without overmixing

Add the dry ingredients to the wet mixture in two additions. Use a silicone spatula or wooden spoon and fold with broad strokes, scraping the bottom and sides of the bowl. After about 12–18 folds, add the floured blueberries and continue folding only until the flour disappears.

A few small lumps are acceptable. Stop when there are no visible dry pockets; mixing until perfectly smooth is the most common way to lose tenderness in this recipe. As a practical guide, the finished batter should be thick enough that the berries remain suspended but soft enough to spread with a spatula.

5. Fill and bake

Scrape the batter into the prepared pan and smooth the top. Add reserved blueberries or coarse sugar if desired. Bake on the center rack for 55–65 minutes in a 9-by-5-inch pan.

Start checking at 52 minutes. The loaf is done when a wooden pick inserted in the center comes out with a few moist crumbs but no wet batter. If you use an instant-read thermometer, the center should be approximately 96–99°C / 205–210°F. Avoid testing directly through a blueberry, since melted berry juice can make a fully baked loaf look underdone.

6. Cool before slicing

Set the pan on a cooling rack for 15 minutes. Lift out the loaf using the parchment, remove the paper, and cool for at least 60 minutes before slicing. The crumb continues to set as it cools; cutting while hot can make the middle appear gummy even when it was properly baked.

Blender-Friendly Tips That Preserve a Tender Crumb

• Blend liquids only. Eggs, oil, yogurt, sugar, and vanilla can be blended briefly. Add flour by hand.
• Use short pulses. Five to eight seconds on low is generally enough to combine the wet ingredients. Scrape once rather than running the blender continuously.
• Do not puree the zucchini. Grated zucchini gives the bread small pockets of moisture. Pureeing it releases more water and can make the batter loose.
• Do not blend blueberries. Whole berries create distinct fruit pockets; blended berries add liquid and can turn the loaf purple and unevenly baked.
• Choose a wide blender jar when possible. A narrow jar can trap thick yogurt and oil below the blades, encouraging longer blending. If the mixture is not circulating, stop and stir it with a spatula rather than increasing the speed.
• Wash the blender promptly. Rinse the jar with warm water immediately after transferring the wet mixture. Dried egg and yogurt are harder to remove from blade assemblies and seals.

Adjustments for Fresh, Frozen, and Very Wet Ingredients

Fresh blueberries

Use firm berries and fold them in last. If they are very juicy, chill them for 15 minutes before tossing them with flour. This reduces smearing and helps the berries hold their shape.

Frozen blueberries

Add frozen berries directly from the freezer. Thawing releases juice before baking, which can produce purple streaks and extra moisture around the fruit. Frozen berries may extend baking time by 3–5 minutes, so rely on the center test rather than the clock alone.

Large or water-heavy zucchini

After grating, weigh the zucchini and lightly squeeze it until you have 180 g. If the zucchini is exceptionally watery, squeeze it a little more rather than changing the flour amount. Conversely, if you use pre-shredded zucchini that is already quite dry, do not add extra water; the yogurt and oil provide the recipe’s remaining moisture.

Storage, Freezing, and Common Mistakes

Store the completely cooled loaf in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate it for up to 5 days, although refrigeration can make the crumb feel firmer. Warm individual slices for 10–15 seconds in a microwave to soften them.

To freeze, wrap individual slices or the whole loaf tightly in plastic wrap followed by foil, then freeze for up to 2 months for best texture. Thaw wrapped at room temperature. Slicing before freezing reduces waste and makes it possible to remove only what you need.

• Dense loaf: The batter was likely overmixed, the leaveners were old, or the flour was compacted in the measuring cup. Weighing the flour and folding gently are the best fixes.
• Gummy middle: The pan may have been too small, the zucchini too wet, or the loaf sliced while hot. Continue baking until the center reaches about 96–99°C / 205–210°F.
• Sinking berries: Excessively wet berries or batter that is too thin can pull fruit downward. Keep frozen berries frozen and toss them with the measured flour.
• Burned edges: A dark pan, an oven running hot, or a rack too close to the heating element can cause this. Use a light metal pan, check the oven temperature, and tent the loaf once the top is sufficiently browned.
• Dry bread: Excess flour and overbaking are the usual causes. Weigh 240 g flour, retain some zucchini moisture, and begin checking several minutes before the maximum bake time.

Easy Variations

• Lemon-blueberry version: Add the finely grated zest of one lemon, approximately 2 teaspoons, to the wet ingredients.
• Whole-wheat blend: Replace up to 60 g of the all-purpose flour with 60 g whole-wheat flour. The loaf will be slightly denser and more nutty.
• Crunchy topping: Mix 25 g rolled oats, 20 g flour, 15 g brown sugar, and 15 g melted butter. Sprinkle over the batter before baking.
• Lower-sugar version: Reduce sugar from 150 g to 130 g. Do not reduce the oil or yogurt at the same time, since those ingredients help maintain moisture.
• Nut addition: Fold in 60 g chopped walnuts or pecans with the blueberries. Keep the total add-ins near 210 g so the loaf does not become difficult to bake through.

Frequently Asked Questions

Can I make this blueberry zucchini bread recipe without a blender?

Yes. A whisk is sufficient for the eggs, sugar, oil, yogurt, and vanilla. The blender is optional and is mainly useful for quickly combining wet ingredients; mixing by hand also makes it easier to avoid overworking the batter.

Should I peel the zucchini?

No. The peel is thin, adds color, and softens during baking. Wash and dry the zucchini, trim the ends, and grate it with the coarse side of a box grater.

Can I use whole-wheat flour?

Replace up to 60 g of the 240 g all-purpose flour with whole-wheat flour without changing the other ingredients. Using 100% whole-wheat flour will produce a heavier loaf and may require a few additional minutes of baking.

Why is my zucchini bread wet in the middle?

Common causes include excess zucchini liquid, an undersized pan, underbaking, or slicing before the loaf has cooled. Lightly squeeze the zucchini, use a pan no smaller than 8 by 4 inches, and check the center with a wooden pick or thermometer.

Can I use frozen blueberries without thawing them?

Yes. Fold them in while frozen after tossing them with the 8 g flour. Thawed berries release more liquid and are more likely to streak the batter or create wet pockets around the fruit.

How long does blueberry zucchini bread keep?

It keeps in an airtight container at room temperature for up to 3 days or in the refrigerator for up to 5 days. For longer storage, freeze wrapped slices or the whole loaf for up to 2 months, then thaw at room temperature.