Irresistible Zucchini Brownies

A stack of zucchini brownies on parchment paper
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5 from 1 reviews

I’ve been making these Zucchini Brownies for years and I’m just gonna say it: they are the BEST. With the perfect balance of fudgy and cakey, plus a thin layer of chocolate frosting, these brownies are totally irresistible!


For the brownies:

  • ½ cup olive oil
  • 1½ cups white sugar
  • 2 teaspoons pure vanilla extract
  • 2 cups all-purpose flour
  • ½ cup unsweetened cocoa powder
  • 1½ teaspoons baking soda
  • 1 teaspoon kosher salt
  • 2 cups shredded zucchini (23 zucchinis)

For the frosting:

  • 6 tablespoons unsweetened cocoa powder
  • ¼ cup butter or vegan alternative
  • ¼ cup milk
  • 2 cups confectioners’ sugar
  • ½ teaspoon vanilla extract


1. Prep your tools. Preheat your oven to 350F. Line a 9×13 inch baking pan with parchment paper or grease with PAM or your preferred baking spray.

2. Mix wet ingredients. In a large bowl combine the oil, sugar and 2 teaspoons vanilla until well blended.

3. Combine dry ingredients. In a medium bowl combine the flour, ½ cup cocoa, baking soda and salt.

4. Add the dry ingredients to the wet ingredients, stirring just to combine. Fold in the zucchini and mix well. The batter will be very dry and you’ll think you should add eggs or milk, but don’t do it!

5. Spread into the prepared pan, gently tapping the mixture down.

6. Bake for 25 to 30 minutes in the preheated oven, until brownies spring back when gently touched. Remove from the oven and set aside to cool.

7. Make the frosting. Melt together the 6 tablespoons of cocoa, the butter and the milk in the microwave for about 40-60 seconds. Mix well with a spatula or metal spoon. Allow to cool slightly, then add the vanilla and the confectioners sugar ½ cup at a time, mixing well between additions.

8. Spread the frosting over the brownies once the brownies have cooled. Allow to set for an hour before digging in. Store in the fridge for up to 3 days.


This recipe was slightly adapted from 

Keywords: zucchini brownies, chocolate zucchini brownies, vegan zucchini brownies