These easy zucchini brownies come out rich and chocolatey and stay moist for days (although they don’t last that long in my house).  They’re topped with a quick and easy homemade 1 minute frosting for a perfect dessert!

Zucchini Brownie on a white plate with fork in foreground and pan of them in the background with text

Every year I end up with tons of zucchini which is great for me because I really love it!  It’s perfect grilled on it’s own or breaded to make oven baked zucchini fries but I do think it’s especially good in baking. It just adds so much moisture and it seems that baked items with zucchini are even BETTER the next day!

These brownies are super moist and delicious… and you’d never know they have zucchini in them (nor will your kids)!  They are rich and chocolatey and just perfectly delicious!  Of course these Zucchini Brownies are great the day they’re made but they’re even better on the second day.

Baking sheet of Zucchini Brownies with a few removedOne thing you need to know about this recipe is that when you get the flour/sugar combined… just before you add the zucchini the consistency will seem quite dry.  Don’t worry, this is expected.  Stir in the zucchini and your batter will moisten and as the batter bakes the zucchini releases moisture keeping these brownies amazing. You’ll want to make sure you don’t squeeze or drain your zucchini, you want all of the moisture in there (and no peeling required either)!

Two stacked Zucchini Brownies with pan of them in the background

I top this with a 1 Minute Frosting recipe that I’ve been using for years!  It works perfectly on any cake or brownie recipe that is contained in a pan and requires just a few ingredients you likely already have on hand!

Items you’ll need for this recipe:

* Vanilla Extract * Zucchini * 9 x 13 pan *

 

image of Everyday Comfort cookbook by Holly Nilsson of Spend With Pennies plus text
Zucchini Brownie on a white plate with fork in foreground and pan of them in the background
4.74 from 93 votes

Zucchini Brownies with 1 minute Frosting!

Servings 18 brownies
These easy zucchini brownies come out rich and chocolatey and stay moist for days (although they don’t last that long in my house). They’re topped with a quick and easy homemade 1-minute frosting for a perfect dessert!
Servings 18 brownies
Prep Time 15 minutes
Cook Time 23 minutes
Total Time 38 minutes
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Ingredients  

  • ½ cup vegetable oil
  • 1 ½ cups granulated sugar
  • 2 teaspoons vanilla extract
  • 1 egg
  • 2 cups all-purpose flour
  • ½ cup unsweetened cocoa powder
  • 2 teaspoons baking soda
  • 2 ½ cups grated zucchini undrained (about one large)

1 Minute Frosting

  • cup milk
  • cup butter
  • 1 ½ cups granulated sugar
  • 1 cup chocolate chips

Instructions 

  • Preheat oven to 350°F.
  • Grease and flour a 9×13 pan.
  • Combine oil, sugar, egg and vanilla. In a separate bowl, combine flour, cocoa powder and baking soda. Add the flour mixture to the sugar mixture and stir well. (It will appear quite dry). Gently stir in the zucchini and spread the mixture into your prepared pan.
  • Bake 25-30 minutes.

1 Minute Frosting

  • While cake is cooling, combine butter, milk and sugar in a small pan. Bring to a boil over medium heat. Allow to boil vigorously for 30 seconds. Remove from heat and stir in chocolate chips. Immediately pour over warm brownies. Let cool completely before cutting.
4.74 from 93 votes

Nutrition Information

Calories: 327 | Carbohydrates: 52g | Protein: 3g | Fat: 12g | Saturated Fat: 8g | Cholesterol: 19mg | Sodium: 166mg | Potassium: 106mg | Fiber: 1g | Sugar: 40g | Vitamin A: 185IU | Vitamin C: 3.1mg | Calcium: 27mg | Iron: 1.2mg

Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.

Course Dessert
Cuisine American

 

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Lemon Zucchini Cupcakes

frosted Lemon Zucchini Cupcakes

Pumpkin Zucchini Bread with Cream Cheese Glaze

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And a couple of zucchini recipes from my friends you’re going to want to check out!

Zucchini Brownies with a title

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About the author

Holly Nilsson is the creator of Spend With Pennies, where she creates easy, comforting recipes made for real life. She is also the author of “Everyday Comfort,” which promises to inspire even more hearty, home-cooked meals.
See more posts by Holly

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4.74 from 93 votes (41 ratings without comment)

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Comments

  1. Oh my gosh these were incredible!  The brownie was moist and not too sweet. The frosting gave it the proper sweetness. These were amazing!5 stars

  2. Hello. Is it possible to substitute a different vegetable for the zucchini in these recipes? If so, what substitutes would work best?

  3. What a fabulous idea. Love the idea of incorporating zucchini into the recipe. I’ve been craving brownies and came across your recipe. Will be making these today…. can I use butter in place of oil? Thank you ☺️

      1. Oh my, I followed the recipe exactly as written. These are the BEST brownies ever. So chocolatey, and moist. You can’t tell that they have zucchini in them. Next time I make them I’ll use butter in place of the oil just to see if it make a difference in taste. This will definitely by my go to recipe. Doing my happy dance 5 stars

  4. Husband is diabetic and wants me to use stevia or Splenda in place of the white sugar. Will this work for these brownies and what would be the conversion of either for the white sugar?

    1. I haven’t tried it with Splenda or stevia so I can’t say if it would work. If you do try it the package likely has a conversion chart for baking.

  5. This is a great recipe. I am making it for the second time for a family dinner. Thanks for adding that the batter would be dry as I would have probably added liquid and it wouldn’t have turned out. The frosting was so good!

  6. These sound delicious. I have always enjoyed zucinhini bread. I can’t wait to try the brownies and some of your other recipes.

  7. If I’ve shredded and frozen my zucchini before hand and I want to use it for this recipe there is a lot of water in the bag. Should I still add this water to the recipe or should I drain it out first?

      1. Hi Paulette, we generally do not drain the zucchini before adding to the mixture. If you feel it is an excessive amount of liquid you could drain some off if you prefer. Let us know how it turns out!

    1. We leave them covered on the counter for about 2 days. If it’s going to be longer I would suggest storing them in the fridge as the zucchini makes them very moist.

  8. Very late to the zucchini brownies train, atleast I am about to try bc I reallly want zucchini brownies!!; So would 1\4 cup of butter work bc i dont use vegetable oil !?

  9. Followed the recipe, but added in some chocolate chips to the batter. Turned out excellent! I took some into work, and everyone loves them!! Will most definitely make these again, and keep this recipe on hand. Thank you so much!! Out of curiosity, what would the calorie count be? I cut mine into maybe 1 1/2 inches by 1 1/2 inches.

  10. Hmm, not sure why these didn’t work for you. Did you drain your zucchini first? The moisture in the zucchini is needed to keep the recipe moist.

  11. I used frozen zucchini that I had in my freezer, and this definitely turned out to be a cake. Still delicious!!!

    1. That’s interesting, I’m glad it was still delicious! I wonder if it had to do with the water lost during freezing. Did you defrost your zucchini first (and did it lose a lot of water)?

  12. I have made these before and they are simply wonderful! I was going to try making them in muffin cups this time so that they are easier to transport (via mail-I mail care packages to my son at school)…has anyone tried that? Wonder how it will change the baking time?? Any suggestions?
    Thanks!

  13. Zucchini brownies are a great idea in the summer too, when I have an abundance. YUM.

  14. Love this recipe. Have made chocolate zucchini bread before, the frosting looks decadent and QUICK! Woo hoo!!!