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Chocolate Zucchini Brownies
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5 from 1 vote

Chocolate Zucchini Brownies

Prep Time10 mins
Cook Time25 mins
Cooling15 mins
Total Time50 mins
Course: Dessert
Cuisine: American
Servings: 9 - 12
Author: Pam / Original by Fabulously Frugal


  • 8 x 8 baking dish


Chocolate Zucchini Brownies:

  • cup vegetable oil
  • ½ cup semi-sweet chocolate chips
  • 2 tbsp unsweetened cocoa powder
  • 1 cup white sugar
  • 1 whole egg
  • 1 egg yolk
  • 1 tsp vanilla extract
  • 1 cup zucchini, finely grated, excess moisture squeezed out
  • 1 cup flour
  • ½ tsp salt
  • ¼ tsp baking soda

Chocolate Frosting:

  • 3 tbsp unsalted butter
  • 3 tbsp semi-sweet chocolate chips
  • tbsp whole milk
  • tbsp cocoa powder
  • ¼ tsp vanilla extract
  • 1 cup powdered sugar


  • Preheat the oven to 350 degrees. Line an 8 x 8 baking dish with some parchment paper then spray with cooking spray. 
  • Make the brownies by combining the oil, chocolate chips and cocoa powder in a saucepan over medium-low heat. Whisk or stir often, until the chips are melted and the mixture is smooth. 
  • Remove pan from the heat and whisk in the sugar until combined.
  • Add the whole egg and additional egg yolk, one at a time, whisking in between each addition.
  • Add the vanilla extract and whisk until smooth and creamy. 
  • Add the squeezed out shredded zucchini and mix until well combined. 
  • Combine the flour, salt and baking soda in a bowl; mix well. 
  • Gradually add the flour mixture to the zucchini mixture until combined. Be careful not to over mix.
  • Spread batter evenly into the prepared baking dish and bake for 27-30 minutes, or until a wooden tester inserted in the center comes out clean or with only a few moist crumbs. 
  • Make the frosting while the brownies are baking by combining the butter, chocolate chips, milk and cocoa powder together in a small saucepan over low heat.
  • Cook, stirring often, until the chocolate chips melt then immediately remove from the heat. Side Note: Don't overcook the chocolate or it will seize and not be spreadable. 
  • Whisk in the vanilla and the powdered sugar, until combined and smooth. It will be thick. 
  • When the brownies come out of the oven, pour the frosting on and spread it evenly over the top. Cool for 10-15 minutes, then lift the brownies from the pan, slice and serve. 
  • Store remaining brownies (if there are any!) covered in the refrigerator. Enjoy.