Blueberry Zucchini Bread Recipe: Moist and Easy

This blueberry zucchini bread recipe makes one moist 9-by-5-inch loaf with a tender crumb, bright berries, and enough structure to slice cleanly without becoming heavy.

Blueberry Zucchini Bread Recipe

Yield: 1 loaf, about 10–12 slices
Prep time: 20 minutes
Bake time: 55–70 minutes
Oven: 350°F (175°C)

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Ingredients

• 2 cups (250 g) all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon fine salt
• 1 teaspoon ground cinnamon
• 1/4 teaspoon ground nutmeg, optional
• 2 large eggs, room temperature
• 3/4 cup (150 g) granulated sugar
• 1/2 cup (120 ml) neutral oil, such as canola or vegetable oil
• 1 teaspoon vanilla extract
• 1 1/2 cups (about 180 g) grated zucchini
• 1 1/4 cups (about 175 g) fresh blueberries
• 1 tablespoon all-purpose flour, for coating the blueberries

Optional additions

• 1 teaspoon finely grated lemon zest
• 1/2 cup chopped walnuts or pecans
• 2 tablespoons coarse sugar for the top

How to Make It

1. Prepare the pan and oven

Heat the oven to 350°F (175°C). Grease a 9-by-5-inch metal loaf pan and line it with parchment paper, leaving enough paper over the long sides to lift out the finished loaf.

A light-colored metal pan usually gives the most predictable result. If using a dark metal or glass pan, begin checking the loaf about 5 minutes earlier because the edges may brown faster. Do not use a smaller pan unless you are prepared for a longer bake and a taller, potentially underbaked center.

2. Manage the zucchini moisture

Wash and trim the zucchini, then grate it on the large holes of a box grater. Measure 1 1/2 cups after grating. The goal is to remove excess liquid without drying the zucchini completely.

Place the grated zucchini in a clean kitchen towel or several layers of paper towel. Squeeze firmly once or twice over the sink. It should feel damp and compact, but it should not drip continuously. Very watery zucchini may need a second squeeze; dry, small zucchini may need little or no pressing.

3. Combine the dry ingredients

In a medium bowl, whisk together the flour, baking powder, baking soda, salt, cinnamon, and nutmeg. Mixing these ingredients first distributes the leaveners and spices evenly, reducing the chance of dense or bitter pockets in the loaf.

4. Mix the wet ingredients

In a large bowl, whisk the eggs and sugar for about 30 seconds, just until smooth. Whisk in the oil and vanilla. Add the drained zucchini and lemon zest if using.

The oil keeps the bread soft for several days, while the zucchini contributes moisture without requiring milk or yogurt. Avoid beating the eggs and sugar for several minutes; this recipe does not need a large whipped-egg structure.

5. Add the flour and blueberries

Toss the blueberries with 1 tablespoon of flour. This is not a guarantee that every berry will stay suspended, but it lightly absorbs surface moisture and helps reduce sinking.

Add the dry ingredients to the wet ingredients and fold with a spatula until only a few dry streaks remain. Fold in the coated blueberries gently. Stop mixing as soon as the flour disappears. The batter should be thick and scoopable, not pourable like cake batter.

6. Bake

Scrape the batter into the prepared pan and smooth the top. Sprinkle with coarse sugar if desired. Bake for 55–70 minutes, rotating the pan once after about 35 minutes if your oven heats unevenly.

Start checking at 55 minutes. The loaf is ready when the top is golden, the center springs back lightly when pressed, and a toothpick inserted into the middle comes out with a few moist crumbs. A toothpick touching a blueberry may look wet, so test in two or three nearby spots.

For the most reliable check, the center should reach approximately 200–205°F (93–96°C) on an instant-read thermometer. If the top is browning but the center is not done, loosely cover the loaf with foil and continue baking in 5-minute increments.

7. Cool before slicing

Let the loaf cool in the pan for 15 minutes. Use the parchment to lift it onto a rack and cool for at least 45 minutes before slicing. Cutting immediately can make the crumb appear gummy because the interior is still setting.

Fresh Versus Frozen Blueberries

Fresh blueberries can be folded in directly after being washed and thoroughly dried. If the berries are particularly large, use slightly fewer or cut a portion in half so the slices hold together more easily.

Frozen blueberries work well, but keep them frozen until the last moment. Do not thaw them first. Toss them with the tablespoon of flour while still frozen, then fold them into the batter quickly. Frozen berries may add gray or purple streaks, especially if stirred aggressively, but they will still produce good flavor and moisture.

Why the Loaf Can Turn Out Gummy

• Too much zucchini liquid: Measure the zucchini after squeezing, not before. Excess water can leave the center wet even when the crust looks finished.
• Underbaking: Check the center rather than relying only on the color of the top. Continue baking in short intervals if the toothpick shows wet batter.
• Overmixing: Stirring too long develops gluten and can make the loaf rubbery or dense. Fold only until the dry ingredients are incorporated.
• Slicing too soon: Allow at least 45 minutes of cooling. The crumb firms as it cools.
• An oversized zucchini: Very mature zucchini may have a watery interior and large seeds. Remove the soft seedy center before grating, then drain the flesh well.

Useful Adjustments

For a less sweet loaf

Reduce the sugar to 2/3 cup (about 135 g). The loaf will be slightly less moist and will brown less deeply, but the blueberries and cinnamon will remain prominent.

For a taller loaf

Use a 8 1/2-by-4 1/2-inch loaf pan, but fill it no more than two-thirds full. Any extra batter can be baked in a greased muffin cup. The smaller pan may require 65–80 minutes, so use the center-temperature or toothpick test rather than a fixed time.

For a whole-wheat variation

Replace up to 1/2 cup (60 g) of the all-purpose flour with fine whole-wheat flour. More than that can make the bread heavy unless you add an extra tablespoon or two of liquid, and the final texture will be less delicate.

Storage

Once completely cool, wrap the loaf or place it in an airtight container. It keeps at room temperature for up to 3 days. Refrigeration extends storage to about 5 days but can make the crumb firmer; let slices come to room temperature or warm them briefly before serving.

To freeze it, wrap the whole loaf tightly or freeze individual slices between layers of parchment. Store for up to 3 months. Thaw wrapped at room temperature so condensation forms on the wrapping rather than on the bread.

Frequently Asked Questions

Should zucchini be peeled?

No. The skin is thin, adds color, and softens during baking. Peel only zucchini with unusually tough skin.

Can olive oil be used?

Yes, provided it has a mild flavor. Extra-virgin olive oil can add a noticeable fruity or peppery taste, while a neutral oil keeps the blueberries and spices in the foreground.

Why did my blueberries sink?

Very thin batter, heavy berries, and excess berry moisture can all contribute. Use the measured flour coating, drain wet berries, and avoid adding extra liquid. A properly thick batter should support most of the fruit.

Can this recipe be made into muffins?

Yes. Divide the batter among 12 lined muffin cups and bake at 350°F (175°C) for approximately 20–25 minutes, checking when the tops spring back and a toothpick comes out with moist crumbs.