Zucchini Brownies Recipe – NatashasKitchen.com

These Zucchini Brownies are perfectly moist, and oh-so fudgy. You will never taste the hidden vegetables inside this scrumptious summer dessert. The chocolate is sweet and the shredded zucchini disappears right into the batter, giving you an ooey-gooey and moist zucchini brownie that you will not want to miss.

I know what you’re thinking… vegetables in a dessert recipe, Natasha? You’re going to have to trust me, this combination is pure magic. It tastes just like our classic Brownie Recipe.

Stack of moist zucchini brownies

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The Best Zucchini Brownies

Zucchini brownies are based on our moist and Fudgy Brownie Recipe that I shared in Natasha’s Kitchen Cookbook. If you enjoy sneaking zucchini into everything, these zucchini brownies are a real treat.

We are on a real zucchini kick in our house since our garden is producing like crazy. For breakfast, we have been making Zucchini Fritters on repeat, and we love crispy Fried Zucchini chips as a side for lunch or dinner.

But when it comes to dessert, we especially love sneaky zucchini recipes, like our delicious Zucchini Bread and sweet Zucchini Muffins, because as my daughter said, “THIS is how I eat zucchini”. If you love the extra moisture and nutrition zucchini adds to baked goods, or you also have a picky little one, you have to try this Zucchini Brownie recipe while zucchinis are in season.


All of your traditional brownie ingredients, plus a little something special. You can also change up the recipe with add-ins (see variation ideas below).

  • Butter – unsalted, cut into pieces
  • Semisweet chocolate chips – Melted for creamy chocolate flavor in the mix, and sprinkled on top for added texture on top
  • Eggs – to bind the batter together
  • Sugar – for the perfect amount of sweetness and to balance the bitterness of cocoa powder
  • Oil – light olive oil or vegetable oil
  • Vanilla – Use our homemade vanilla for the best flavor
  • Flour – All-purpose, or gluten-free if desired
  • Unsweetened cocoa powder – creates the characteristic deep chocolate flavor we expect from brownies.
  • Baking powder and baking soda – Act as leavening agents
  • Salt – I almost always use fine sea salt
  • Shredded zucchini – From 1-2 medium zucchini. Grate using the largest holes on your box grater.
Ingredients for zucchini brownies- butter, eggs, zucchini, chocolate chips, eggs, cocoa powder, vanilla...

How to Make Zucchini Brownies

  • Prepare – Preheat your oven to 350°F and butter a 9×13 inch metal pan and line it with parchment paper. 
  • Melt chocolate – In a medium saucepan, melt together 2 cups of chocolate chips and butter while whisking constantly. Do not boil. Once it’s smooth, remove it from the heat and let cool for 15 minutes. 
  • Dry Ingredients – In a small mixing bowl, combine flour, cocoa powder, baking powder, baking soda, and salt and whisk together. 
  • Wet Ingredients – In a second large bowl, whisk together eggs, sugar, oil, and vanilla until blended. Whisk in the cooled chocolate chip mixture. 
  • Mix – Add your dry ingredients to the wet ingredients and stir to combine.
  • Fold – Fold in the grated zucchini and walnuts until well combined. Pour the batter into the baking pan and sprinkle the remaining chocolate chips on top. Bake at 350°F for 35-40 minutes.
Melt chocolate chips and butter together on the stove, stir constantly with a whisk

Pro Tip

Using a 9×13 metal pan vs. a glass pan will give you those delicious, crispy edges on your brownies. Metal pans are better conductors of heat which may cause your brownies to have a slightly shorter baking time than a glass pan. If you only have a glass pan, watch and test your brownies with a toothpick as the bake time may vary.

Steps to make moist brownies with zucchini

Pro Tip

Check your oven temperature with an inexpensive oven thermometer since most ovens aren’t truly fully preheated even when they indicate they are. 


No matter what you choose to mix into your zucchini brownies, we suggest using half a cup of your add-in of choice. Some of our favorites are:

  • Chopped nuts – pecans, walnuts, or any nut of your choice
  • Chocolate chunks – for a little more melty chocolate goodness in each bite
  • Peanut butter or cream cheese – swirled into the batter after it has been added to the pan
  • Coconut flakes – add a tropical sweetness and a more chewy texture
  • Mint chocolate candies – such as Andes, chopped
  • Sea salt – a couple of pinches, sprinkled on top

Common Questions

Can I substitute cucumber for zucchini?

We do not recommend using cucumber in this recipe. Your brownies would be very soggy.

Are zucchini brownies healthy?

Using zucchini adds some vitamins and fiber. It is still, however, a calorie-rich, sweet dessert. See the nutrition label below for more details.

Do I need to peel zucchini before grating them?

There is no need to peel the zucchini before grating them. The skin on a medium zucchini is thin enough to eat, so peeling does not change the taste or texture either way.

Can I double the recipe?

Absolutely. I suggest that you weigh your pans after you portion your batter (as seen in my Zucchini Bread video) so you can ensure that your brownies bake at the same rate in the oven.

Zucchini brownies with chocolate chips baked inside, cut into squares

How to Serve Zucchini Brownies

Once you have baked your delicious brownies, you can customize the flavor in so many ways before serving.

Cut your brownies into twenty-four pieces. Our favorite way to serve brownies is with a generous scoop of vanilla ice cream or a dollop of whipped cream on top.

Zucchini brownies sliced into squares in the pan, ready to serve

How to Store Brownies

You’ll be happy to know that brownies, including these zucchini brownies, keep very well and stay soft and moist for days.

  • At Room Temperature – Brownies can be stored at room temperature in an airtight container for 2-3 days or in the refrigerator for up to a week.
  • Freezer – You can freeze brownies for up to 3 months. Wait for them to cool completely and then wrap in plastic wrap and one layer of aluminum foil. To keep brownies moist, do not cut them until you are ready to serve.
Zucchini brownies topped with chocolate chips in a 9x13" metal pan

Make these for your family and have them try to guess what the secret ingredient is. My family didn’t guess correctly, but their look of surprise was priceless when I told them it was zucchini… Two full cups of zucchini! It blends in quite nicely and adds terrific moisture to make these brownies even more satisfying. It’s definitely still a dessert but somehow I feel better about eating a zucchini brownie.

More Summer Dessert Recipes

If you love using summer produce to create sweet treats like these Zucchini Brownies, then you won’t want to miss these other dessert recipes that use fresh seasonal produce.

Zucchini Brownies Recipe

Zucchini brownies stacked to serve

These Zucchini Brownies are so moist and fudgy, no one will ever suspect they have zucchini in them. This is the best zucchini brownie recipe.

Prep Time: 15 minutes

Cook Time: 40 minutes

Cooling time: 15 minutes

Total Time: 1 hour 10 minutes

  • Preheat oven to 350 ̊F. Butter a 9×13 metal pan and line it with parchment paper.
  • In a medium saucepan over medium/low heat, melt together 2 cups chocolate chips and butter while whisking constantly. Do not boil. Once it’s smooth, remove from heat and set aside to cool for 15 minutes.

  • In a small mixing bowl, whisk together flour, cocoa powder, baking powder, baking soda, and salt.

  • In a second large bowl, whisk together eggs, sugar, oil, and vanilla until blended. Whisk in the cooled chocolate mixture.

  • Add dry ingredients to the wet ingredients and stir until well combined.

  • Fold in the zucchini until well incorporated. Pour the batter into the prepared baking pan. Sprinkle the remaining 1/2 cup chocolate chips over the top.

  • Bake at 350 ̊F for 35-40 minutes. For fudgy brownies, bake for 35-37 minutes or until a toothpick comes out mostly clean. If you prefer them a bit more firm, bake for 40 minutes or until a toothpick comes out clean.

278kcal Calories30g Carbs3g Protein17g Fat9g Saturated Fat1g Polyunsaturated Fat5g Monounsaturated Fat0.3g Trans Fat42mg Cholesterol106mg Sodium188mg Potassium2g Fiber20g Sugar296IU Vitamin A2mg Vitamin C29mg Calcium2mg Iron

Nutrition Facts

Zucchini Brownies Recipe

Amount per Serving

% Daily Value*

* Percent Daily Values are based on a 2000 calorie diet.

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