Fudgy and chocolatey Healthy Zucchini Brownies made with shredded zucchini, whole wheat flour, and no refined sugar. No one ever realizes that there is 2 cups of zucchini packed into these zucchini brownies!
We love healthy zucchini recipes around here! While these brownies are the ultimate chocolate treat, if you’re looking for something more “breakfast-friendly,” you have to try my healthy chocolate zucchini bread or healthy zucchini bread.
Why You’ll Love This Recipe
These healthy zucchini brownies are pure delight – fudgy, healthy, and easy. They taste like “real” decadent brownies but are made with whole foods! It’s the ultimate way to get kids (and husbands) to eat their greens without a single complaint.
Because zucchini is seasonal but the love for brownies is year-round, I usually bake these all summer. When the garden slows down, I switch to my black bean brownies or sweet potato brownies, but this zucchini brownie recipe remains the gold standard for texture.
- 2025 re-tested and perfected: I re-tested this recipe twice in August 2025 to find the perfect balance of sweetness. I discovered that using 3/4 cup maple syrup (instead of 1/2 cup) creates an even fudgier, more indulgent texture.
- Better-for-you ingredients: We use whole wheat or spelt flour and natural sweeteners. No refined sugar or butter required!
- No high maintenance prep: No wringing out your shredded zucchini for hours, just a quick squeeze and into ONE bowl they go.
- Fudgier with time: These zucchini brownies actually taste better the next day once the coconut oil has settled.
If you prefer a sweeter, denser brownie, go with the 3/4 cup maple syrup variation mentioned in the recipe card’s notes!
Reader’s Review
This is the 3rd or 4th time I’ve made these. They are beyond delicious. I appreciate that they are not very sweet but they are very chocolaty!
Alyssa
Ingredients for Healthy Zucchini Brownies
Zucchini is the perfect vegetable to sneak into desserts because of both its mild taste and high water ratio that keeps your brownies moist without ever fear of being dry.
- Zucchini: We will be adding a full 2 cups of shredded zucchini, not squeezed. I recommend a medium shred (using a box grater) so it melts into the batter perfectly.
- Egg: For holding these brownies together.
- Whole wheat or spelt flour: You can use only whole wheat or spelt flour. Any gluten-free flour will not work because this zucchini brownie recipe relies on gluten in dough to rise. All-purpose flour acts differently too.
- Pure maple syrup: I love to use this natural sweetener because its flavor is mild without overpowering. My August 2025 re-test proved that 3/4 cup makes them extra fudgy, while 1/2 cup keeps them “lightly sweet”.
- Coconut oil: I find coconut oil best to use because it is solid. Zucchini brownies will be a tad more fudgy as they cool and oil becomes solid again after baking. Plus, that means these are dairy-free!
- Cacao powder: A superfood full of antioxidants and nutrients. Can use unsweetened cocoa powder too.
- Vanilla extract: Always use pure vanilla extract for the best depth of flavor. It rounds out the richness of the cacao and masks any “earthy” notes from the zucchini.
- Salt: A pinch of sea salt or kosher salt is essential! It doesn’t make the brownies salty; instead, it acts as a flavor enhancer that makes the chocolate taste even more intense.
Variations
Baking is a science, but there is some room for customization! Here is what worked (and what didn’t) in my kitchen tests:
- The “fudge factor” (2025 update): I have re-tested recipe in August 2025 – see photo above. I used more maple syrup and brownies turned out more fudgy and sweet, which I and my oldest son like. My husband likes the original version more – less sweet. So, maybe try both ways.
- Liquid sweeteners: You can use any other liquid sweetener like honey, agave, brown rice syrup. Do not use granulated sugar, as it will make the batter too dry.
- Other oils: You can use any mild tasting oil like avocado oil, however best results are with coconut oil! Melted butter is an option, but the texture will be slightly more “cake-like”.
- Add-ins: For an extra treat, sprinkle a handful of dark chocolate chips or sugar-free Lily’s chocolate chips on top before baking. Or stir in a handful of chopped walnuts or pecans in to the batter for a crunch in every bite.
- Egg substitute: I tested these with applesauce instead of an egg, and they turned out very cakey. For that fudgy texture, the egg is essential!
- Flour: I don’t recommend swapping the flour here. This recipe relies on the protein in whole wheat or spelt to rise against the moisture of the zucchini.
How to Make Healthy Zucchini Brownies
This recipe comes together in one bowl. While the process is simple, pay close attention to the zucchini prep – it’s the secret to that perfect fudgy texture.
Important Baking Dish Tip
I find that zucchini brownies turn out more fudgy baked in a glass baking dish. Metal baking pan distributes heat evenly, resulting in more cakey brownies. Ceramic dish falls somewhere in-between. Also, I highly recommend to line glass baking dish with parchment paper for easy removal.
- Prep the zucchini: Shred your zucchini using the medium-sized holes of a box grater. Place it in a colander to drain naturally while you prep the other ingredients.
- Whisk the liquids: In a large bowl, whisk together the egg, melted coconut oil, maple syrup, and vanilla extract. 2026 tip: Ensure your coconut oil isn’t boiling hot so it doesn’t accidentally scramble the egg!
- Add dry ingredients: Add the cacao powder, baking soda, and salt to the wet ingredients. Whisk until the mixture is smooth and looks like a thick chocolate sauce.
- The gentle squeeze: Take your shredded zucchini and give it one firm, gentle squeeze with your hands to remove excess liquid (about 1-2 tablespoons), then stir it into the chocolate mixture.
- Fold in flour: Add your whole wheat or spelt flour. Stir gently with a spatula until just combined. Do not overmix, or the brownies will become tough. Pour batter into prepared pan.
- Bake: Bake for 25-28 minutes in 375 degrees F preheated oven. Top should be soft and glossy and the centre not too jiggly.
- Cool properly: Let brownies cool in the pan for about 1 hour. Then transfer to a cooling rack to cool off completely. If you have patience, brownies become fudgier next day.
Baking Time Tip
Do not overbake brownies! Also ovens vary! They might seem slightly undercooked when you test them. Pull the brownies out when the center is no longer jiggly and a toothpick comes out with a few damp, chocolatey crumbs attached. They will continue to firm up as they cool.
Zucchini Tips for Best Brownies
- The “gentle squeeze” rule: Don’t wring the zucchini bone-dry! One gentle squeeze in a colander is enough. You only want to remove about 1-2 tablespoons of liquid to keep the brownies fudgy, not soggy.
- Don’t peel: The skin is where the nutrients live! It’s so thin that it completely disappears during baking, so there’s no need for the extra prep work.
- Handle giant zucchini right: If using a massive garden zucchini, slice it in half and scoop out the large, woody seeds before grating. Large seeds can add a bitter taste and a weird texture to your smooth brownie batter.
- Use the right hole size: Use the medium-sized holes on your box grater. Fine grating makes the zucchini too mushy, while the largest holes might leave visible “green strands” that picky eaters will spot.
How to Store
Overnight: Zucchini brownies taste even better the next day as they settle and cool off. That’s when brownies become really fudgy as coconut oil solidifies and settles.
At first brownies might look like cake. I leave them on a plate covered with kitchen towel on the counter overnight.
Past 24 hours mark: For longer storage, keep in an airtight container, in a cool dry place for up to 4 days. If it’s hot outside, keep in refrigerator for up to 1 week.
Freezing: Freeze brownies in a freezer-safe container for up to 3 – 4 months. I would be surprised if you have any left to freeze.:)
Crust Tip
Crust? There is no such obvious crust on healthy brownies as with their butter and sugar counterpart. However, if you cut and place brownies on a plate, their sides and edges will dry up a bit overnight.
Why Are My Zucchini Brownies Cakey?
If your brownies turned out more like chocolate cake than fudgy brownies, it usually comes down to one of these four factors I identified during my 2025 kitchen testing:
- Too much flour: This is the #1 culprit. If you scoop your measuring cup directly into the flour bag, you pack it down and end up with too much. Always use the “spoon and level” method or a kitchen scale.
- Over-squeezing the zucchini: While we give the zucchini a “gentle squeeze,” if you wring it out completely dry, you lose the moisture needed to create that fudgy, dense texture.
- Over-baking: Since these are made with whole wheat flour and maple syrup, they can go from fudgy to cakey in just 2 extra minutes. Remember: pull them out when the toothpick has a few moist crumbs – not when it comes out perfectly clean!
- Not using coconut oil: In my re-tests, using liquid oils like avocado oil resulted in a slightly lighter, fluffier crumb. For the ultimate dense fudge, coconut oil is king because it solidifies as it cools.
If you find you actually prefer a lighter, more “snack-cake” style treat, you might enjoy my healthy chocolate cake or these healthy brownies which have a naturally fluffier crumb.
FAQs
No, not at all! The zucchini melts into the batter, providing moisture and texture without any vegetable flavor. It’s the ultimate “hidden veggies” dessert.
Because we use coconut oil and natural sweeteners, the structure needs time to set. As the brownies cool completely (or chill in the fridge), the healthy fats solidify, turning the texture from “cake-like” to “fudgy.”
This specific recipe is optimized for whole wheat or spelt flour. If you need a gluten-free version, I recommend trying my oat flour brownies or almond flour brownies instead, as swapping for GF all-purpose flour here can make them too gummy.
More Healthy Zucchini Recipes
- Chocolate zucchini muffins
- Chocolate veggie muffins
- Healthy chocolate zucchini cake
- Healthy zucchini muffins
- Healthy zucchini cake
- Healthy zucchini cookies
More Brownies Recipes to Try
Best Ever Healthy Zucchini Brownies
Video
Ingredients
- 2 cups zucchini, large size hole shredded (not tightly packed)
- 1 large egg
- 1/2 cup coconut oil, melted
- 1/2 cup maple syrup, honey or any liquid sweetener
- 1 teaspoon pure vanilla extract
- 1/2 cup cacao or cocoa powder
- 1/2 teaspoon baking soda
- 1/4 teaspoon salt
- 1 cup whole wheat or spelt flour
Instructions
- Place zucchini in a colander while you are getting other ingredients ready.
- Preheat oven to 375 degrees F and line 8 x 8 glass baking dish with unbleached parchment paper. Set aside.
- In a large bowl, add egg, oil, maple syrup and pure vanilla extract; whisk to combine.
- Add cacao powder, baking soda and salt; whisk until well mixed.
- Give zucchini a gentle squeeze but do not ring out completely, add to a bowl and stir.
- Add flour and mix gently until combined.
- Transfer batter into prepared baking dish and level with spatula. Bake for 25-28 minutes or until the centre is barely jiggly. Do not over bake as brownies will have more of a cake consistency. A toothpick inserted has to come out somewhat not clean. If centre is too jiggly bake a bit more – ovens vary.
- Remove from the oven and let cool for about an hour. Lift by the parchment paper flaps and transfer to a cooling rack to cool off completely. Then cut into 16 squares and enjoy!
Notes
- Re-test Aug 2025: I re-tested recipe with 3/4 cup maple syrup and found brownies more fudgy and sweet, I like it more but many readers like recipe as is. You can also add chocolate chips for sweeter brownies.
- Glass baking dish: Brownies turn out more fudgy. Metal pan works but results in more cakey texture.
- Store 1st day: Brownies become fudgier the next day, especially if stored cut up and separated or refrigerated. I leave them on a plate covered with kitchen towel on a counter overnight.
- Store past 24 hrs: In a glass airtight container in a cool dry place for up to 4 days. If it’s hot outside, refrigerate for up to a week.
- Freeze: In airtight container for up to 3 – 4 months.
- Flour: You can use only whole wheat or spelt flour. Any gluten free flour will not work because it doesn’t have gluten in it. All purpose flour acts differently than whole wheat flour, too.
- Maple syrup: You can replace only with liquid sweetener like honey, agave, or brown rice syrup.
- Coconut oil: You can use any mild tasting oil like avocado oil or your favorite. One thing though. Because coconut oil is solid, zucchini brownies will be a tad more fudgy as it cools down and becomes solid again after baking.
- Cacao powder: More common cocoa powder is OK to use.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
Super yummy! The perfect note of chocolate you need when you’re craving something on that pesky diet you’re on ?
These are so good! I replaced the egg with flax egg and cooked it in a aluminium foil lined saucepan for 15 mins (we don’t have an oven). Worked a treat!
Simone – ithappenstobevegan.com
Thanks for sharing that Simone! I was wondering if I replaced the egg with a mashed banana would work well too. I’ll give it a try tomorrow 🙂
You don’t even need to replace the egg, the recipe works perfectly without egg. I think the zucchini acts as a binder, although I grate it with the small holes on the grater not the largest one.
I really the recipe. The brownies were good but I used flour and they were gummy. Will try again and use whole wheat flour. They were not sweet so I’ll add chocolate chips. Also grate the zucchini as small as possible
Making my 4th batch this zucchini season, I just have really enjoyed eating these.
I really appreciate hearing how much you have enjoyed the brownie recipe, Katie.
I just made them, the taste is fantastic!!
They are really rich in chocolate taste, super light (and it is not always like this while using only whole wheat flour) and also humid. Will definetely bake them again.
The only little “problem” I faced is that they break apart a bit while cutting into them. Probably it depended on the fact that my zucchinni was not the freshest one and maybe there was a little lack of liquid.
Probably tomorrow they will become more fudgy. Excited to bake more of your healthy AND tasty recipes!
Thank you so much for the kinds words. You have have no idea how much I appreciate it.
Sooo chocolaty. My friends raved over them.
Made these using olive oil instead of coconut oil and added dark chocolate chips and walnuts – so good! You can’t even tell there is zucchini in it (I absolutely love zucchini in all forms but these pretty much look and taste like your typical brownies except not sickeningly sweet). I do agree with the other reviews that the 1/2 cup of honey isn’t quite enough for sweetness without adding extra chocolate chips. Overall this is a fantastic healthy brownie base and I’ll definitely be making more of this with other toppings!
These are really good, I’m making my third batch now! This time I’ve sprinkled the top with dark chocolate chips, and have decided that next time I will definitely make double as they go so quickly. Thank you for sharing your recipe.
You are very welcome Pippa!
These were SO yummy!! Two big thumbs up! And easy to make!
Awe, glad you think so April 🙂
Amazing, amazing, amazing. Not much more I can say
These definitely turned more fudgey the next day, so I would recommend making them 1-2 days before you want to consume them! However, they were not sweet enough. I used 1/2 a cup of maple syrup. Do you have any suggestions for ingredients that could make it sweeter in the future? Should I use less cocoa maybe?
Thanks!
Baking is a science and I have tested the recipe as written. You can experiment with adding more maple syrup or using a different liquid sweetener. Just be careful not to add too much more liquid to disrupt the liquid to dry ingredients balance.
I really liked all the assistance with directions. Being new to baking with zucchini, all the notes were helpful and my brownies turned out great.
Thank you for the feedback! Happy baking!