Decadent Double Chocolate Zucchini Bread: Your New Favorite Summer Treat
Indulge in the luscious fusion of garden-fresh zucchini and rich cocoa with our Double Chocolate Zucchini Bread. This recipe takes our beloved classic zucchini bread and elevates it to new heights of chocolatey decadence. Amazingly moist and packed with flavor, this quick bread comes together with a simple list of ingredients and just one heaping cup of shredded zucchini, baked to perfection in a little over an hour. It’s the ideal way to enjoy the season’s bounty while satisfying your chocolate cravings!

The peak of zucchini season is upon us! Whether you’re harvesting an abundance from your garden or stocking up at the local farmer’s market, there’s always a delicious reason to incorporate this versatile summer squash into your cooking. Here in Minnesota, zucchini is plentiful, inspiring us to continually find creative and delightful ways to enjoy it. Building on the foundation of our popular traditional zucchini bread recipe, we’ve crafted this incredibly rich and satisfying double chocolate version. It’s a guaranteed hit and a definite must-make for your summertime baking repertoire!
Sweetened naturally with ripe bananas and a touch of maple syrup, this chocolate zucchini bread boasts an unparalleled moistness that will have everyone reaching for a second slice. The addition of wholesome zucchini ensures every bite is incredibly tender, making it a perfect treat for breakfast, an afternoon snack, or a delightful dessert.
What Makes This Chocolate Zucchini Bread So Special?
This isn’t just any zucchini bread; it’s a celebration of rich chocolate flavor and tender texture, cleverly enhanced by the humble zucchini. The “double chocolate” name comes from the generous amounts of unsweetened cocoa powder woven into the batter, complemented by an abundance of melty chocolate chips studded throughout. What’s even better? You likely have most, if not all, of these simple baking staples in your pantry right now.
Key Ingredients for the Best Chocolate Zucchini Bread
Each ingredient plays a crucial role in creating the perfect loaf. Here’s a closer look at what you’ll need and why it works:
- All-Purpose Flour: The foundation of our quick bread, providing structure and a tender crumb.
- Unsweetened Cocoa Powder: The first dose of chocolate! Using unsweetened cocoa powder allows us to control the sweetness and achieve a deep, rich chocolate flavor without being overly sweet.
- Zucchini: Approximately 1 heaping cup of shredded zucchini (from about 1 medium-large zucchini) is essential. Its magic lies in adding incredible moisture to the bread without imparting a strong “vegetable” flavor. Pro tip: Squeeze out as much excess moisture from the shredded zucchini as possible before mixing it into the batter. This crucial step prevents your bread from becoming soggy.
- Chocolate Chips: The second dose of chocolate, and absolutely non-negotiable for a true double chocolate experience! We tested this recipe with and without, and the version loaded with chocolate chips was the clear, undisputed winner. Semisweet chips work wonderfully, but feel free to experiment with your favorite kind.
- Brown Sugar & Maple Syrup: This dynamic duo provides a balanced sweetness and contributes to the bread’s moistness. Brown sugar adds a lovely caramel note and depth, while maple syrup offers natural sweetness and a subtle, distinctive flavor.
- Melted Butter: For a rich, buttery flavor and added moisture, enhancing the overall indulgence.
- Large Eggs: Act as a binding agent, helping to hold all the ingredients together and providing structure to the loaf.
- Ripe Bananas: The riper, the better! Mashed bananas contribute natural sweetness and additional moisture, creating an incredibly tender and flavorful bread. They also add a subtle fruity note that pairs beautifully with chocolate.
- Unsweetened Almond Milk: Helps achieve the perfect batter consistency and adds to the overall moisture. Any dairy or non-dairy milk can be used.
- Baking Soda & Baking Powder: These leavening agents work together to give the bread its beautiful rise and light, airy texture.
- Salt: A pinch of salt is vital for balancing the sweetness and enhancing all the other delicious flavors in the bread.

Creative Substitutions & Variations
One of the best things about quick breads is their flexibility. Here are a few swaps and variations you can try to customize your chocolate zucchini bread to your taste and dietary needs:
Flour: While we recommend all-purpose flour for the best texture, you can experiment with a blend. Try using half whole wheat flour and half all-purpose flour for a slightly denser, more rustic loaf with added fiber. We don’t recommend an all-whole-wheat substitution as it can significantly alter the texture.
Chocolate Chips: Get creative! Use dark chocolate chips for an intense flavor, milk chocolate for a sweeter profile, white chocolate chips for a visual contrast, or even mini chocolate chips for an even distribution in every bite. Chocolate chunks or chopped chocolate bars also work wonderfully.
Eggs: For an egg-free or vegan option, substitute the two large eggs with two flaxseed eggs (2 tablespoons ground flaxseed mixed with 6 tablespoons water, let sit for 5-10 minutes until gelled).
Bananas: If you don’t have ripe bananas on hand or prefer a different flavor, substitute the 1 cup of mashed banana with 1 cup of unsweetened applesauce or pumpkin puree. Both will add moisture and a subtle sweetness.
Milk: Any type of dairy or non-dairy milk will work in this recipe. Feel free to use cow’s milk, soy milk, oat milk, or coconut milk based on your preference.
Add-ins: Consider folding in a handful of chopped walnuts or pecans for a delightful crunch. A teaspoon of vanilla extract or a pinch of cinnamon can also enhance the flavor profile.

Craving more zucchini?
Easy Classic Zucchini Bread
If you adore this chocolate zucchini bread, you’ll love our light and fluffy traditional zucchini bread recipe too!

Frequently Asked Questions (FAQ)
Absolutely no need to peel the zucchini! The skin not only adds beautiful flecks of green color to your bread, but it also contributes extra nutrients and fiber. Zucchini skin is quite thin and tender, unlike some other vegetables, so it softens perfectly during baking. However, if you genuinely dislike the texture or appearance of the skin, feel free to peel it before grating.
For the best results and texture in your zucchini bread, we recommend using the largest holes on a standard box grater. This yields nice, substantial shreds of zucchini that add moisture without disappearing completely into the batter. A food processor with a grating attachment can also make quick work of this task, just be careful not to over-process it into a watery mush.
A soggy zucchini bread is almost always due to excess moisture from the zucchini. Zucchini contains a lot of water, and if not removed, this water will release into your batter during baking, making your bread dense and wet. After grating the zucchini, it is critically important to place it in the center of a clean tea towel or several layers of paper towels, wrap it up, and squeeze out as much liquid as you possibly can. Don’t be shy – you’ll be surprised how much water comes out!
If you notice the top of your zucchini bread browning too quickly during baking, especially if the center isn’t fully cooked, simply create a “tent” with a piece of aluminum foil. Loosely place the foil over the loaf pan halfway through the baking time. This will shield the top from direct heat and prevent it from over-browning while allowing the rest of the bread to cook through evenly.
Yes, absolutely! This recipe can easily be adapted for muffins. Simply preheat your oven to 375°F (190°C), line a muffin tin with paper liners or spray with non-stick spray. Fill the muffin cups about two-thirds full and bake for 18-25 minutes, or until a toothpick inserted into the center comes out clean. Baking time will vary depending on the size of your muffins.
The most reliable way to check for doneness is the toothpick test. Insert a wooden skewer or toothpick into the center of the loaf. If it comes out clean with no wet batter attached, your bread is ready. A few moist crumbs are acceptable, but liquid batter indicates it needs more time.

Storage and Freezing Tips for Maximum Freshness
Once you’ve baked a delicious loaf of chocolate zucchini bread, you’ll want to ensure it stays fresh for as long as possible. Proper storage is key to maintaining its incredible moisture and flavor.
After the chocolate zucchini bread has cooled completely to room temperature, wrap it tightly in plastic wrap, aluminum foil, or place it in an airtight container. Stored at room temperature, it will remain fresh and moist for up to 3 days. For extended freshness, especially in warmer climates, storing it in the refrigerator is best; it will last wonderfully for up to 5 days.
To freeze chocolate zucchini bread: This bread freezes beautifully, making it perfect for meal prepping or enjoying a taste of summer later in the year. Ensure the loaf is entirely cooled before preparing it for the freezer. Wrap the whole loaf or individual slices securely in several layers of plastic wrap, then an additional layer of aluminum foil, or place it in a freezer-safe bag or container. Label with the date and freeze for up to 3 months. To enjoy, simply thaw at room temperature or gently warm slices in the microwave or toaster oven.

How to Freeze Zucchini for Baking All Year Round
If you’re faced with a bounty of zucchini from your garden or found an irresistible sale at the grocery store, don’t let any of it go to waste! Freezing zucchini is an incredibly simple process, ensuring you can enjoy its benefits in your baking, like this chocolate zucchini bread, long after summer has faded. It’s as easy as 1-2-3!
- Wash and Shred: Begin by washing your zucchini thoroughly. Then, shred it into a bowl using a box grater (we typically use the coarse grate setting) or a food processor with a shredding attachment.
- Remove Excess Moisture: This step is crucial! Place the shredded zucchini in the middle of a clean tea towel or between several layers of paper towel. Gather the edges of the towel and twist firmly, squeezing out as much water as you possibly can. You’ll be surprised by the amount of liquid released!
- Pack and Freeze: Transfer the squeezed, shredded zucchini into freezer-safe containers or resealable freezer bags. Press out any excess air from the bags to prevent freezer burn. Label each container or bag with the date and the amount of zucchini (e.g., “1 cup shredded zucchini”). Place it in the freezer, where it will keep beautifully for up to 6 months.
When you are ready to use frozen zucchini: Simply remove the desired amount from the freezer and allow it to thaw in the refrigerator overnight or at room temperature. Once thawed, repeat the process of squeezing out any additional excess water, as thawing can release more moisture. Your zucchini will then be ready to use in this recipe or any other baked goods, just like fresh!

Still Have Zucchini to Use Up? Try These Delicious Recipes!
After whipping up a glorious loaf of this chocolate zucchini bread, you might still find yourself with an abundance of zucchini from the garden. Don’t worry, we’ve got you covered with more fantastic ways to use up summer’s favorite squash. Explore these other mouth-watering zucchini recipes:
- Fluffy Zucchini Muffins
- Wholesome Oatmeal Zucchini Cookies
- Irresistible Zucchini Oatmeal Cups with Chocolate Chips
- Hearty Whole Wheat Zucchini Waffles with Chocolate Chunks
- Even More Healthy Ways to Use Zucchini
- Flavorful Grilled Zucchini
Yum! The possibilities are endless when it comes to zucchini!
Rating: 4 out of 5 stars based on 5 votes
Chocolate Zucchini Bread
This chocolate zucchini bread is simple to make, ready in just over an hour, and loaded with chocolate. A summertime must-make!
By: Emily Richter
Prep Time: 20 mins
Cook Time: 1 hr
Total Time: 1 hr 20 mins
Servings: 12 slices

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Ingredients
Dry Ingredients
- 1¾ cups all-purpose flour
- ½ cup unsweetened cocoa powder
- 1 teaspoon baking soda
- 1 teaspoon baking powder
- ½ teaspoon salt
- 1 cup shredded zucchini, liquid removed (~1 medium zucchini)
- ½ cup semisweet chocolate chips, plus more for topping
- ½ cup brown sugar, packed
Wet Ingredients
- 3 tablespoons unsalted butter, melted
- ¼ cup maple syrup
- 2 large eggs
- 1 cup mashed ripe banana
- 1 cup unsweetened plain almond milk
Instructions
- First, preheat your oven to 350ºF (175ºC). Prepare a standard loaf pan by lightly spraying it with non-stick cooking spray or lining it with parchment paper, leaving an overhang on the sides to easily lift the bread out later.
- Prepare the zucchini: Using the coarse grate side of a cheese grater or a food processor, grate the zucchini. There’s no need to peel it! Once grated, place the shredded zucchini in the center of a clean tea towel or several layers of paper towel. Gather the edges and twist firmly, squeezing out as much moisture as possible. This step is crucial for preventing a soggy loaf. Once squeezed, measure out 1 cup of the dried shredded zucchini.
- In a large mixing bowl, combine all the dry ingredients: flour, cocoa powder, baking soda, baking powder, salt, the prepared shredded zucchini, chocolate chips, and brown sugar. Whisk everything together thoroughly to ensure all ingredients are evenly distributed. Set this bowl aside.
- In a separate large bowl, use a hand mixer or a whisk to cream together the melted butter, maple syrup, and brown sugar until well combined and slightly lighter in color.
- Add the two large eggs and the mashed ripe banana to the creamed wet ingredients. Mix until everything is fully incorporated and smooth.
- Now, gradually add the dry ingredients mixture to the wet ingredients. Mix on low speed or by hand until just combined. Be careful not to overmix; overmixing can lead to a tough bread. Finally, add the almond milk and mix again until the batter is smooth. Gently fold in the additional semisweet chocolate chips (if using for the batter) by hand.
- Carefully transfer the bread batter into your prepared loaf pan. You can sprinkle a few extra chocolate chips on top for a beautiful finish, if desired.
- Bake in the preheated oven for 30 minutes.
- After 30 minutes, if the top is browning too quickly, loosely tent the loaf pan with a piece of aluminum foil. Continue baking for an additional 25-30 minutes, or until a wooden skewer or toothpick inserted into the center of the bread comes out clean.
- Once baked, remove the loaf from the oven. Allow it to cool in the loaf pan for about 10 minutes before carefully lifting it out onto a wire rack to cool completely. Cooling completely is important for the bread to set properly and prevent a gummy texture.
Tips & Notes
- Zucchini Preparation: As mentioned, we don’t peel the zucchini before using it. The skin adds fantastic color and a boost of nutrients. Plus, zucchini skin is quite thin and tender, making it perfectly suitable for baking. However, if you have a strong preference, feel free to peel your zucchini before grating.
- Don’t Overmix: Overmixing the batter can develop the gluten in the flour too much, resulting in a dense, tough bread. Mix until just combined.
- Use Ripe Bananas: For the best sweetness and moisture, use very ripe bananas (those with brown spots are perfect!).
Nutrition Information (Approximate per serving)
Calories: 229 kcal, Carbohydrates: 38 g, Protein: 5 g, Fat: 7 g, Fiber: 3 g, Sugar: 19 g
Nutrition information is automatically calculated, so should only be used as an approximation.
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More of our Favorite…
Delightful Zucchini Recipes
- Easy Zucchini Bread (Classic Version)
- Healthy Ways to Use Zucchini
- Flavorful Grilled Zucchini
- Zucchini Muffin Recipe
- Chocolate Chip Zucchini Oatmeal Cups
Photography: Photos for this post were beautifully captured by Ashley McGlaughlin from The Edible Perspective.