These are so moist and chocolaty. A recipe passed down from my mother-in-law who passed away 10 years ago. The first time I made these my husband and I cried as he said, 'This is my mom!' So to honor a special woman whose 5 food groups were chocolate chip cookies, chocolate cake, brownies, chocolate candy, and chocolate ice cream, I give you the ultimate brownie recipe!

Recipe Summary

prep:
20 mins
cook:
25 mins
additional:
30 mins
total:
1 hr 15 mins
Servings:
20
Yield:
20 servings
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Ingredients

20
Original recipe yields 20 servings
The ingredient list now reflects the servings specified
Brownies:
Frosting:

Directions

Instructions Checklist
  • Preheat oven to 350 degrees F (175 degrees C). Grease a rimmed baking sheet.

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  • Whisk white sugar, canola oil, and eggs together in a bowl. Mix flour, 1/4 cup cocoa powder, baking soda, cinnamon, and salt together in a separate bowl. Stir sugar mixture into flour mixture; add 1 teaspoon vanilla extract and mix batter. Fold zucchini and nuts into batter; pour onto the prepared baking sheet.

  • Bake in the preheated oven until cooked through, 25 to 30 minutes. Cool brownies completely.

  • Stir 6 tablespoons cocoa powder and melted butter together in a bowl; stir in confectioners' sugar, milk, and 1/2 teaspoon vanilla extract until frosting is smooth. Spread frosting on brownies.

Cook's Note:

Depending on the size of your brownies, you might have more bars. My husband's mom was very generous with her portions.

Nutrition Facts

406 calories; protein 4.3g 9% DV; carbohydrates 45.3g 15% DV; fat 24.6g 38% DV; cholesterol 43.5mg 15% DV; sodium 276.7mg 11% DV. Full Nutrition

Reviews (32)

Read More Reviews

Most helpful positive review

Rating: 5 stars
09/17/2015
So delicious! I halved the cake portion of the recipe replacing the nuts for mini chocolate chips (for the kids) and baked it in an 11x7 baking pan so it came out a bit thicker more like a cake but it was perfect for us. I do wish that just for the sake of knowing the size pan would've been indicated. I did use the full recipe of the frosting which was also delicious. Loved the hint of cinnamon in this too! This was so simple to make and came together in minutes...this recipe is a definite keeper YUM!!!!! Thanks for sharing.:) Read More
(4)

Most helpful critical review

Rating: 1 stars
07/20/2019
I used a jelly roll sized pan since it did not say specifically. It was not big enough so ended up going over and everywhere. Texture was not like a brownie. Only use if you are planning on a sheet cake. Read More
41 Ratings
  • 5 star values: 33
  • 4 star values: 5
  • 3 star values: 0
  • 2 star values: 0
  • 1 star values: 3
Rating: 5 stars
09/17/2015
So delicious! I halved the cake portion of the recipe replacing the nuts for mini chocolate chips (for the kids) and baked it in an 11x7 baking pan so it came out a bit thicker more like a cake but it was perfect for us. I do wish that just for the sake of knowing the size pan would've been indicated. I did use the full recipe of the frosting which was also delicious. Loved the hint of cinnamon in this too! This was so simple to make and came together in minutes...this recipe is a definite keeper YUM!!!!! Thanks for sharing.:) Read More
(4)
Rating: 5 stars
07/20/2016
awesome but it did take 40 mins in a rectangler pan Read More
(3)
Rating: 5 stars
07/03/2016
Yummy and very moist. Even my zucchini-shy husband approved! Instead of 1 1/2 cups of oil, I used 3/4 cup oil and 3/4 cup applesauce. Omitted the nuts and used ready-made frosting. I baked it in a 9x13 pan, so it took much longer to bake and turned out more like a dense cake rather than brownies. I will be making this again. Read More
(2)
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Rating: 4 stars
09/08/2017
Made as directed minus nuts. I used a 17.25" x 11.5" baking sheet, but it still came out more cake like than brownie. Tasty way to use up zucchini! Read More
(2)
Rating: 5 stars
09/18/2016
Everyone loved these. Very moist and rich chocolate flavor. Read More
(1)
Rating: 5 stars
07/21/2017
I have made this recipe in years past. It is a winner. I have made the brownies/cake and share with many people. They always want this recipe!! This is the most yummy flavorful moist cake. I make mine with California Walnuts I get at Trader Joes. Thanks for having this wonderful recipe on your site for us zucchini growers!! Read More
(1)
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Rating: 5 stars
02/08/2016
Very moist, dense. Very tasty. Will definitely make it again. Read More
(1)
Rating: 5 stars
09/13/2018
Everyone thought they were the best, most moist brownies ever! Read More
(1)
Rating: 5 stars
09/09/2018
No Changes, Exellent as is. Read More
(1)
Rating: 1 stars
07/20/2019
I used a jelly roll sized pan since it did not say specifically. It was not big enough so ended up going over and everywhere. Texture was not like a brownie. Only use if you are planning on a sheet cake. Read More