Zucchini Brownies
These Zucchini Brownies are fudgy, deeply chocolatey, and built on a classic butter and melted dark chocolate base! Three quarters of a cup of grated, squeezed zucchini disappears completely during baking, adding moisture without any vegetable flavor. Coconut sugar sweetens the batter with a natural caramel depth, and two hits of dark chocolate chips (melted into the butter base and folded into the batter) create layers of chocolate intensity in every bite!
Whisking the eggs and sugar vigorously for 2 to 3 minutes produces the crinkly, shiny top crust that most zucchini brownie recipes miss entirely. The salted butter seasons the brownie from within, so no additional salt is needed. These zucchini brownies are ultra fudgy, gooey, and delicious!
Do Zucchini Brownies taste like zucchini?
No. Zucchini Brownies do not taste like zucchini at all. Grated zucchini has almost no flavor of its own, and the moisture it releases during baking integrates completely into the batter. What you taste is only dark chocolate, cocoa, and the subtle caramel depth of coconut sugar.
The zucchini simply acts as a moisture source, keeping the brownies fudgy without adding any vegetable taste.
Ingredients
- 3/4 cup grated zucchini, with moisture squeezed out
- 1/2 cup salted butter, melted
- 1 cup dark chocolate chips (melted into butter)
- 2 large eggs
- 1 cup coconut sugar or granulated sugar
- 2 tbsp dark cocoa powder
- 1 tsp vanilla extract
- 1/4 cup gluten free flour
- 1/2 cup dark chocolate chips (folded into batter)
What Each Ingredient Does
Grated zucchini, squeezed
Squeezing the grated zucchini before measuring is the most important prep step. Zucchini holds a significant amount of water, and if you skip this, that excess water enters the batter and produces gummy brownies. Squeeze in paper towels until no more liquid comes out, then measure the three-quarters cup from what remains.
Salted butter and dark chocolate chips
Salted butter seasons the brownie from within, which is why no additional salt appears in the ingredient list. Combined with the first cup of dark chocolate chips, it creates the glossy, dense chocolate base. Both must melt together completely before going into the batter.
Eggs and coconut sugar
Whisking the eggs and coconut sugar vigorously for 2 to 3 minutes creates the foam that produces the crinkly, shiny top crust. Coconut sugar adds a natural caramel undertone that pairs well with dark cocoa and dark chocolate. Granulated sugar substitutes directly at 1:1.
Gluten free flour, dark cocoa, and folded chocolate chips
One quarter cup of gluten free flour holds the batter together. All-purpose flour substitutes at the same amount. Dark cocoa deepens the chocolate flavor. The second half cup of dark chocolate chips folds into the batter to create melted pockets throughout every brownie. Sugar-free dark chips work but produce a less shiny top crust.
How to make Zucchini Brownies, step by step
First, grate the zucchini. Once grated, use paper towels to fully squeeze out the excess moisture. Then, measure out the 3/4 cup. Set aside.
Then, preheat oven to 350 degrees Fahrenheit. Line an 8 inch square pan with parchment paper.
Add melted butter and 1 cup dark chocolate chips to a bowl. Stir until creamy and fully melted. If needed, microwave for 10 to 15 seconds. Set aside.
In a mixing bowl, add eggs and sugar. Whisk vigorously for 2 to 3 minutes, until light and frothy.
Add the melted chocolate mixture to the mixing bowl. Stir to combine.
Then, add in dark cocoa powder, vanilla, flour and espresso powder. Stir to combine.
Fold in the grated zucchini and the chocolate chips.
Pour batter into the lined pan. Smooth out into one even layer.
Bake for 25 to 28 minutes or until toothpick inserted comes out mostly clean.
Finally, remove from oven. Allow brownies to cool before slicing into.
Why Squeezing the Zucchini Matters
Zucchini is about 95 percent water by weight. When grated and added without squeezing, that water releases during baking and saturates the batter, producing gummy brownies that never firm up. Squeezing removes enough moisture for the zucchini to still contribute its fudgy benefits without flooding the batter.
Measure after squeezing, not before. A cup of grated zucchini before squeezing is significantly more than three-quarters cup after, and too much zucchini produces gummy brownies even when squeezed.
Tips for the Best Result
Squeeze the zucchini and measure after
Squeeze until no more liquid comes out, then measure the three-quarters cup. Measuring after squeezing, not before, is essential for the right texture.
Whisk eggs and sugar for the full 2 to 3 minutes
The crinkly, shiny top comes from vigorous whisking. Cutting this step short produces flat, matte brownies with less visual appeal and less structure.
Use high-quality dark chocolate chips
The chips melt into the butter base and fold into the batter, contributing to the entire chocolate flavor. A good dark chip makes a noticeable difference. Sugar-free chips work but produce a less shiny crust.
Do not overbake
The toothpick should come out mostly clean. The zucchini moisture keeps these brownies wetter than a standard brownie right out of the oven. They firm up significantly as they cool.
Substitutions
| Original | Substitute | Notes |
|---|---|---|
| Gluten free flour | All-purpose flour (same amount) | Direct swap |
| Coconut sugar | Granulated sugar (1:1) | More neutral sweetness |
| Dark cocoa powder | Regular cocoa powder | Lighter, milder chocolate flavor |
| Salted butter | Unsalted butter + 1/4 tsp sea salt | Same result |
| Dark chocolate chips | Semi-sweet chocolate chips | Slightly sweeter, lighter color |
Storage
Room temperature: Store in an airtight container for up to 3 days. The zucchini keeps these brownies moist longer than a standard brownie.
Refrigerator: Refrigerate for up to 5 days for a firmer texture and cleaner slices.
Freezer: Wrap individual brownies tightly and freeze for up to 3 months. Thaw at room temperature for 30 minutes before eating.
Frequently Asked Questions
No. Unsqueezed zucchini releases too much water into the batter during baking and produces gummy, wet brownies that do not firm up properly. Squeezing is essential. Also remember to measure the zucchini after squeezing, not before.
Yes. All-purpose flour works as a direct 1:1 substitute with no other changes needed.
Yes. White granulated sugar substitutes directly at 1:1. The caramel undertone from the coconut sugar will be absent but the brownies will taste excellent.
No. More zucchini than three-quarters cup adds more moisture than the low-flour batter can absorb, even after squeezing. The ratio is calibrated specifically for this amount. Adding more produces gummy brownies regardless of how well you squeeze it.
You May Also Like
- Healthy Zucchini Bread
- Vegan Zucchini Muffins
- Vegan Zucchini Fries
- Gluten Free Chocolate Zucchini Bread
- Gluten Free Chocolate Zucchini Muffins
If you make this Zucchini Brownies recipe, I would really appreciate a review! You can find me on Instagram, Facebook, and Pinterest. Join my exclusive Facebook Group for a behind the scenes look. I would love for you to follow along! For more ideas, check out these Dessert Recipes.
Get the Recipe: Zucchini Brownies
Ingredients
- ¾ cup grated zucchini, with moisture squeezed out
- ½ cup melted salted butter
- 1 cup dark chocolate chips
- 2 eggs
- 1 cup coconut sugar or granulated sugar
- 2 tbsp dark cocoa powder
- 1 tsp vanilla extract
- ¼ cup gluten free flour, see note
- ½ cup dark chocolate chips
Instructions
- First, grate the zucchini. Once grated, use paper towels to fully squeeze out the excess moisture. Then, measure out the ¾ cup. Set aside.
- Then, preheat oven to 350 degrees Fahrenheit. Line an 8 inch square pan with parchment paper.
- Add melted butter and 1 cup dark chocolate chips to a bowl. Stir until creamy and fully melted. If needed, microwave for 10 to 15 seconds. Set aside.
- In a mixing bowl, add eggs and sugar. Whisk vigorously for 2 to 3 minutes, until light and frothy.
- Add the melted chocolate mixture to the mixing bowl. Stir to combine.
- Then, add in dark cocoa powder, vanilla, flour and espresso powder. Stir to combine.
- Fold in the grated zucchini and the chocolate chips.
- Pour batter into the lined pan. Smooth out into one even layer.
- Bake for 25 to 28 minutes or until toothpick inserted comes out mostly clean.
- Finally, remove from oven. Allow brownies to cool before slicing into.
Notes
- If you are not gluten free, you can use all purpose flour.
- Grate the zucchini. Then use paper towels to squeeze out the excess moisture. Then, measure out the 3/4 cup.
- For best results, use high quality dark chocolate chips. Sugar free dark chocolate can be used, but the top of the brownies will not be quite as shiny.
- Stir melted butter and chocolate chips until fully melted and creamy. If needed, microwave for only 10 to 15 seconds.
- Regular cocoa powder can be used if needed.
- Do not over bake brownies! They are done when a toothpick inserted comes out mostly clean.
- Allow brownies to cool before slicing.
- Store at room temperature for up to 3 days.