Rich Zucchini Brownies

Here are my healthy zucchini brownies, made with shredded zucchini, cocoa powder, maple syrup, and coconut oil for a fudgy treat that’s secretly packed with veggies.

These brownies are my go-to when I want something chocolatey but don’t want to feel guilty about it. My kids have no idea there’s zucchini in them, and I’m not telling!

What Kind of Zucchini Should I Use?

Any fresh zucchini from your garden or grocery store will work great for these brownies. Medium-sized zucchinis tend to be the best choice since they’re not too watery and have fewer seeds than the really large ones. If you end up with a giant zucchini, just make sure to squeeze out some of the excess moisture after shredding it – too much water can make your brownies soggy instead of fudgy. You don’t need to peel the zucchini either, which saves time and keeps extra nutrients in your brownies.

Options for Substitutions

These brownies are pretty forgiving when it comes to swaps, so here are some options if you need them:

• Zucchini: Yellow summer squash works just as well as zucchini here. Make sure to shred it the same way and don’t squeeze out the moisture – you need that to keep the brownies moist.
• Coconut oil: You can swap this with melted butter, vegetable oil, or even applesauce if you want to cut back on fat. Just note that applesauce will make them a bit more cake-like.
• Maple syrup or honey: Agave nectar, date syrup, or even regular sugar dissolved in 1/4 cup warm water will work. The texture might be slightly different with granulated sugar, but they’ll still taste good.
• Whole wheat or spelt flour: All-purpose flour is a fine substitute, or you can use oat flour for a gluten-free option. If using oat flour, you might need to add a tablespoon or two extra since it absorbs moisture differently.
• Cacao or cocoa powder: Either cacao or cocoa powder works – cacao is less processed but cocoa is more common and cheaper. They’re pretty much interchangeable in this recipe.
• Egg: For a vegan version, try a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water, let sit for 5 minutes) or 1/4 cup applesauce.

Watch Out for These Mistakes While Baking

The biggest mistake people make with zucchini brownies is skipping the step of squeezing out excess moisture from the shredded zucchini, which can leave you with a wet, cake-like texture instead of fudgy brownies – use a clean kitchen towel or cheesecloth to wring out as much liquid as possible.

Another common error is overbaking these brownies since they don’t have as much fat as traditional recipes, so pull them out when a toothpick comes out with a few moist crumbs rather than completely clean.

Make sure your coconut oil is melted but not hot when you add it to the egg mixture, otherwise you might end up with scrambled bits of egg in your batter.

Finally, resist the urge to cut into these brownies right away – letting them cool for the full hour helps them firm up and makes slicing much cleaner and easier.

What to Serve With Zucchini Brownies?

These brownies are pretty rich on their own, so I like to keep things simple and serve them with a cold glass of milk or a scoop of vanilla ice cream on top while they’re still warm. If you’re having people over for dessert, fresh berries like raspberries or strawberries on the side add a nice pop of freshness that balances out the chocolate. For an afternoon snack, they’re perfect alongside a cup of coffee or hot tea, and honestly, they’re just as good eaten straight from the pan with nothing else at all.

Storage Instructions

Store: These zucchini brownies stay moist and fudgy when kept in an airtight container at room temperature for up to 3 days. If you want them to last longer, pop them in the fridge where they’ll keep for about a week. They actually taste amazing cold straight from the fridge!

Freeze: Brownies freeze really well, and these are no exception. Wrap individual pieces in plastic wrap or place them in a freezer-safe container with parchment paper between layers. They’ll stay good for up to 3 months, making them perfect for when you need a quick chocolate fix.

Thaw: When you’re ready to eat a frozen brownie, just let it sit at room temperature for about 30 minutes, or warm it in the microwave for 15-20 seconds. Some people even like eating them straight from the freezer for a fudgy, almost ice cream-like treat.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 1300-1500
• Protein: 18-22 g
• Fat: 62-70 g
• Carbohydrates: 180-200 g

Ingredients

• 2 cups zucchini, finely shredded and gently squeezed
• 1 large egg, room temperature
• 1/2 cup coconut oil, melted
• 1/2 cup maple syrup
• 1 1/2 teaspoons vanilla extract
• 1/2 cup organic cocoa powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon sea salt
• 1 cup all-purpose flour
• 1 teaspoon espresso powder

Step 1: Prepare the Oven and Zucchini

• 2 cups zucchini, finely shredded and gently squeezed

Preheat your oven to 375°F and line a 9×9 inch baking dish with parchment paper.

While the oven heats, place your shredded zucchini in a fine-mesh colander and gently squeeze out excess moisture using your hands or a clean kitchen towel—this prevents the brownies from becoming too wet and dense.

I find that really pressing out that moisture makes a huge difference in the final texture.

Step 2: Mix Wet Ingredients and Sweetener

• 1 large egg, room temperature
• 1/2 cup coconut oil, melted
• 1/2 cup maple syrup
• 1 1/2 teaspoons vanilla extract

In a large mixing bowl, whisk together the room temperature egg, melted coconut oil, maple syrup, and vanilla extract until well combined and slightly emulsified.

This base creates a rich, moist foundation for the brownies and ensures even distribution of fats throughout the batter.

Step 3: Build the Chocolate and Spice Layers

• 1/2 cup organic cocoa powder
• 1 teaspoon espresso powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon sea salt

Add the cocoa powder, espresso powder, baking soda, and sea salt to the wet mixture from Step 2.

Stir vigorously until no dry cocoa streaks remain and the espresso powder is fully incorporated—this will deepen the chocolate flavor and add subtle complexity.

The espresso won’t make the brownies taste like coffee; instead, it amplifies the chocolate notes beautifully.

Step 4: Fold in Zucchini and Flour

• zucchini from Step 1
• 1 cup all-purpose flour

Stir the squeezed zucchini from Step 1 into the chocolate mixture until evenly distributed, then gently fold in the all-purpose flour until just combined—don’t overmix, as this can develop too much gluten and make the brownies tough.

The zucchini adds moisture and nutrients while staying virtually undetectable in the final product.

Step 5: Bake the Brownies

• batter from Step 4

Pour the batter into your prepared baking dish and smooth the top with a spatula.

Bake for 25-28 minutes, until a toothpick inserted into the center comes out with just a few moist crumbs—the brownies will continue to set slightly as they cool, so avoid overbaking.

Step 6: Cool and Set

Remove the brownies from the oven and let them cool in the baking dish for at least one hour before cutting into squares.

This resting time allows the structure to fully set and makes clean cuts possible—rushing this step will result in crumbly, difficult-to-slice brownies.

Rich Zucchini Brownies

Delicious Rich Zucchini Brownies recipe with step-by-step instructions.

Print Recipe Pin Recipe

Prep Time 35 minutes mins

Cook Time 1 hour hr 5 minutes mins

Total Time 1 hour hr 40 minutes mins

Servings: 16 squares

Calories: 1400

Ingredients Method

Ingredients

  

• 2 cups zucchini, finely shredded and gently squeezed
• 1 large egg, room temperature
• 1/2 cup coconut oil, melted
• 1/2 cup maple syrup
• 1 1/2 teaspoons vanilla extract
• 1/2 cup organic cocoa powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon sea salt
• 1 cup all-purpose flour
• 1 teaspoon espresso powder

Method

 

1. Preheat your oven to 375°F and line a 9x9 inch baking dish with parchment paper. While the oven heats, place your shredded zucchini in a fine-mesh colander and gently squeeze out excess moisture using your hands or a clean kitchen towel—this prevents the brownies from becoming too wet and dense. I find that really pressing out that moisture makes a huge difference in the final texture.
2. In a large mixing bowl, whisk together the room temperature egg, melted coconut oil, maple syrup, and vanilla extract until well combined and slightly emulsified. This base creates a rich, moist foundation for the brownies and ensures even distribution of fats throughout the batter.
3. Add the cocoa powder, espresso powder, baking soda, and sea salt to the wet mixture from Step 2. Stir vigorously until no dry cocoa streaks remain and the espresso powder is fully incorporated—this will deepen the chocolate flavor and add subtle complexity. The espresso won't make the brownies taste like coffee; instead, it amplifies the chocolate notes beautifully.
4. Stir the squeezed zucchini from Step 1 into the chocolate mixture until evenly distributed, then gently fold in the all-purpose flour until just combined—don't overmix, as this can develop too much gluten and make the brownies tough. The zucchini adds moisture and nutrients while staying virtually undetectable in the final product.
5. Pour the batter into your prepared baking dish and smooth the top with a spatula. Bake for 25-28 minutes, until a toothpick inserted into the center comes out with just a few moist crumbs—the brownies will continue to set slightly as they cool, so avoid overbaking.
6. Remove the brownies from the oven and let them cool in the baking dish for at least one hour before cutting into squares. This resting time allows the structure to fully set and makes clean cuts possible—rushing this step will result in crumbly, difficult-to-slice brownies.