Our moist chocolate zucchini cake is not only delicious but also a fun way to use up those extra veggies. And to make it even more delicious, we added a rich dark chocolate frosting that will satisfy all your chocolate cravings.
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I look forward to zucchini season every single summer. Zucchini adds such an amazing and moist texture to baked goods.
A zucchini bundt cake, chocolate chip zucchini bread, and some zucchini cake were on my list to make. The first cake recipe I tried was way too sweet. So, I used less sugar, and then tweaked it further with coconut oil and dark cocoa powder.
It turned out to be the best chocolate zucchini cake I have ever had. Trust me, no one will know that there are veggies hiding under all that chocolate.
Why This Zucchini Cake Works
This chocolate zucchini cake is so good, it'll make you want to get more zucchini from the garden or market. Get ready to be the super hero that turns vegetables into a decadent summer dessert.
- Secret ingredient. Chocolate and zucchini might seem like an odd combination, but they go together so well. The rich chocolate goes so well with the moist and mild zucchini flavor. The result is an amazing cake that you won't be able to stop eating.
- Moist and tender texture. Shredded zucchini adds moisture to the cake, making it super soft and tender to bite into. This super ingredient adds a delightful texture to your cake that will leave you wanting more. Say goodbye to dry cakes and hello to a the best way to eat veggies.
- Way to use up excess veggies. If you have extra zucchini from your garden or a generous neighbor, this recipe is a fantastic way to use them. It's a win-win situation. You get to enjoy a delicious cake, and those zucchinis don't go to waste.
- Sweet chocolate frosting. This cake can be enjoyed on its own, but adding frosting takes it to another level. The creamy and sweet frosting enhances the rich chocolate flavor of the cake. Plus, it makes the cake look even more enticing.
If you love dark chocolate cake, then you should try this Dr Pepper cake and this flourless chocolate cake as well.
Key Ingredients
The secret ingredient in this gooey moist chocolate zucchini cake is the grated zucchini. Most recipes have you squeeze the excess liquid out of shredded zucchini. This particular zucchini cake recipe needs ALL the moisture and liquid.
- Coconut Oil - Use a solid coconut oil for this recipe.
- Sugar - A mixture of brown and granulated sweetens this cake and gives it a good flavor.
- Salt & Vanilla - Balances the sweetness and adds flavor.
- All Purpose Flour - Make sure to use the spoon and sweep method when measuring flour, so you do not add too much.
- Dark Cocoa Powder - Gives the zucchini cake a rich dark color and taste.
- Baking Soda - Adds a little bit of lift as the cake bakes.
- Zucchini - 3 medium zucchinis will yield 2 cups packed grated zucchini.
Baking with Zucchini
Zucchini has a very mild flavor, so it pairs well with just about everything. Using grated zucchini in baked goods results in a great moist texture. It also adds a boost of good healthy nutrition.
When choosing zucchini too bake with, look for ones that are small, firm, and have a shiny peel. Smaller zucchinis are better because they are more tender and usually have a higher water content.
Do not squeeze the moisture out of the grated zucchini unless the recipe specifically tells you to do it. Most zucchini recipes are written based on the water content of the vegetable. The dry ingredients and wet zucchini will perfectly balance each other out in the end product.
How to make Chocolate Zucchini Cake
This chocolate zucchini cake recipe comes together in minutes. Just make sure you continue to beat the dry ingredients and grated zucchini until it forms a dough. If you are using a hand mixer, this may take a little bit longer.
- Mix all the dry ingredients together in a large mixing bowl .
- Wash, dry, and grate the zucchinis using a box grater with medium holes. Do NOT squeeze out any of the extra water. The moisture from the zucchini is needed to make the thick dough.
- Add the grated zucchini to the dry ingredients and beat with a stand mixer until a dough forms. Once all the dry ingredients are wet, stop mixing.
- Press the dough evenly into the bottom of a greased 9x13 pan and bake. Cool on a wire rack before adding frosting.
BruCrew Tip: A layer of fluffy dark chocolate frosting takes this zucchini cake to the next level. You can also sprinkle powdered sugar on top if you want to skip the chocolate icing.
Storage Recommendations
On the Counter - This chocolate zucchini cake can be tightly covered and left on the counter for 2-3 days. I actually think it tastes even better after sitting one night.
In the Refrigerator - If you need to keep it longer, place the covered cake in the refrigerator for 4-5 days.
In the Freezer - Wrap the cooled unfrosted cake tightly in a layer of plastic wrap and foil. Place in a freezer safe bag and freeze for 1-2 months. Thaw in the refrigerator overnight, and add the frosting before serving.
Tips and Tricks
- Use young or small zucchinis for this chocolate cake recipe. Large over grown zucchinis tend to be drier, and then the cake will bake very dry too.
- Do not squeeze the moisture out of the grated zucchini! The moisture in this zucchini cake comes from the water in the vegetable.
- Beat the dry ingredients with the zucchini until a stiff dough forms! A stand mixer makes this much easier. Once all the dry ingredients are incorporated, stop mixing. Over mixing can result in a gummy texture.
- Want extra chocolate? Stir ½ cup mini chocolate chips into the cake dough before baking it.
FAQs
One medium zucchini is about 5 ounces. It should yield about 1 cup of sliced zucchini or â…” cup grated packed zucchini. 3 medium zucchinis are close to one pound and will produce two cups of grated zucchini.
No, you do not need to peel your zucchini. Just wash and grate the vegetable. The peels will soften while baking, and almost seem to disappear or melt into the baked goods.
No, this cake with zucchini can be left out on the counter for a few days. If you need to store it for longer, then I would keep it in an air tight container in the fridge.
More Ways to enjoy Chocolate Zucchini
- Zucchini Donuts
- Zucchini Cake with chocolate chips
- Zucchini Brownies
- Zucchini Cookies
- Chocolate Cream Cheese Muffins
- Dark Chocolate Zucchini Bread
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Recipe
Chocolate Zucchini Cake
Our moist chocolate zucchini cake is not only delicious but also a fun way to use up those extra veggies. And to make it even more delicious, we added a rich dark chocolate frosting that will satisfy all your chocolate cravings.
Ingredients
For the Cake
- ½ cup solid coconut oil
- ¾ cup packed brown sugar
- ¼ cup granulated sugar
- 2 teaspoons vanilla extract
- 2 cups all purpose flour
- ½ cup unsweetened dark cocoa powder
- ½ teaspoon salt
- 1 teaspoon baking soda
- 2 cups packed shredded zucchini (3 medium)
For the Frosting
- ¼ cup unsalted butter
- ¼ cup unsweetened dark cocoa powder
- 2 cups powdered sugar
- ½ cup heavy whipping cream
- ½ teaspoon vanilla extract
Instructions
- Preheat the oven to 350 degrees. Spray a 9x13 pan with nonstick baking spray.
- Beat the coconut oil, sugars, and vanilla until it looks like wet sand.
- Add the flour, cocoa powder, salt, and baking soda and mix again. The mixture will be very dry.
- Add the grated zucchini and beat until it forms a thick batter/dough.
- Press the batter evenly into the bottom of the prepared pan. Bake for 24 minutes. Remove and place on a wire rack to cool completely.
- Beat the butter, cocoa powder, and sugar until it looks like a dry powder.
- Slowly add the whipping cream and vanilla. Beat until mixed in, then beat on high until light and fluffy.
- Spread on the top of the cooled cake. Store in a covered container.
Notes
- Adapted from All Recipes
- Use young or small zucchinis for this chocolate cake recipe. Large over grown zucchinis tend to be drier, and then the cake will bake very dry too.
- Do not squeeze the moisture out of the grated zucchini! The moisture in this zucchini cake comes from the water in the vegetable.
- Beat the dry ingredients with the zucchini until a stiff dough forms! A stand mixer makes this much easier. Once all the dry ingredients are incorporated, stop mixing. Over mixing can result in a gummy texture.
- Want more chocolate? Stir ½ cup mini chocolate chips into the dough before baking it.
Nutrition Information:
Yield: 24 Serving Size: 1Amount Per Serving: Calories: 192Total Fat: 9gSaturated Fat: 6gTrans Fat: 0gUnsaturated Fat: 2gCholesterol: 11mgSodium: 101mgCarbohydrates: 27gFiber: 1gSugar: 17gProtein: 2g
*The post for dark chocolate zucchini cake was first published August 2014. The photos were updated July 2017, and the post was updated and republished July 2023.
Paula Gaer
I have a question. I have tons of summer squash. Its dryer than zucchini. Will it work for the choc chip squash cake and this dark chocolate squash cake? I have had great luck making lemon poppy seed bread with summer squash. Can I sub bakers chocolate too?
Jocelyn
I've actually never tried it with summer squash, but I would think it would work ok. How much drier is it because there isn't any other liquid other than from the veggie. If you try it keep me posted on how it turns out.
paula gaer
I made it with summer squash. I added another 1/3 cup of a yogurt/ milk mix I used instead of sour cream. It was AWESOME! Probably the best moist dark chocolate cake ever! I put dark chocolate frosting on it because it was a gift for the students next door. They love it.
Jocelyn
That's awesome to hear. I'm so glad it turned out, and that everyone loved it! 🙂
Cathy
Love this cake. Someone brought in large zucchini's to work so I thought I would try your recipe. It was a big hit. Everyone at work enjoyed and it disappeared. By far my favorite chocolate cake. It's a keeper.
Audrey
I just made this last night. I thought it was a little on the dry side, but I didn't quite have 2 cups of zucchini. Husband ate 2 pieces and my son 4, so it was definitely a hit.
Jocelyn
Yeah, you need the 2 full cups of shredded zucchini. Also, if your zucchini was larger and drier that might affect the outcome. I have made this so many times and never had one turn out dry. I'm sorry yours did...but I'm glad it was a hit anyway!
Local Lavender
These were delicious! Thanks for a great recipe!
ria moore
Love the recipe but maybe my zucchini didn't have enough water. Batter never really thinned out enough to pour, it was more lumpy...but still delicious! I wanted to add liquid but was afraid it would become too thin then. I had to use more whipping cream for frosting than recipe called for as well... Suggestions?
Jocelyn Brubaker
The batter for this cake will never be pourable. You beat the zucchini into the powder mixture last, and it will become a thick stiff dough. I'm not sure why you needed more whipping cream. Did you add the powdered sugar and whipping alternately?
Tatyana
This looks soo good. If you make it in a round cake pan, will it just make 1 cake?
Jocelyn Brubaker
I have not made this in anything but a 9x13 dish. What size round pan are you looking at using? You might need to bake it in 2 layers depending on the size of your pan. Your baking time would be different too, but I'm not sure on the time since I haven't tried that. Keep me posted on what you do!
Tatyana
So I did make it in a 9 inch springform can pan. And I cut the cake in half. It came out very good. Loved the icing. I couldn't even tell there was zucchini in it.
Amy @ Amy's Healthy Baking
Jocelyn, you are my HERO for doing a 24-day cleanse! No way could I give up sugar for that long... I barely last 24 hours without it. And umm, we'll just pretend dark chocolate doesn't count. Because if it didn't, I would totally say this cake would be okay on a cleanse! 😉
Lynn E
So has anyone actually made this? I just did and the batter was really dry, couldn't get the cocoa/flour mixture stirred in completely. I baked it anyway and then though,t are there no eggs in this recipe? Just took it out and it's flat and doesn't looked all the way cooked and still could see some dry areas. I turned the oven off and put them back in. Made the frosting and will try, but they look nothing like the picture and I am quite disappointed so far.
Jocelyn Brubaker
Lynn, I have made this 3 times now and it turned out every single time. Did you squeeze the liquid from your zucchini??? Most recipes have you do that, but you can't do that in this recipe. It needs all the moisture from the zucchini to bake right. I shred the zucchini and put it right in my cocoa/flour mixture. And no there are no eggs in this. You need to use a stand mixer or hand mixer to really incorporate the zucchini into the dry ingredients. It should be a thick batter that needs pressed into the pan.
Lynn+E
No I didn't squeeze it out. I followed all directions and used a hand mixer but was just so dry I should have added something. It's inedible. But the frosting is good.
Jocelyn Brubaker
No, you really do not need to add anything else. All three times I made it I beat it until a thick dark batter formed. I'm wondering if yours just needed to be mixed longer. Beating it longer produces more juice from the zucchini that wets the dry ingredients. I am so sorry it didn't work out for you.
Lynn+E
I guess that's it. Maybe my zucchini were dry too. It's ok, not your fault!
Dorothy
Can you substitute something other than the coconut oil?
Jocelyn Brubaker
You can use a regular cooking oil like canola in place of the coconut oil. I hope you enjoy the cake!!!
Dorothy
Thanks. My granddaughter is allergic to nuts and eggs, so this recipe sounds perfect!
Chels+R.
I am not a morning person either. Ugh, despise mornings. But this cake-wow! Loving the dark chocolate!
Jocelyn Brubaker
Thanks Chels! 🙂
Auntiepatch
My husband's on a diet but the neighbors aren't! I'm headed for the kitchen!
Nancy
This cake looks so good! I love that you are using zucchini with chocolate.
Jocelyn Brubaker
Thanks Mom! 😉
Jessica @ A Kitchen Addiction
I can't resist dark chocolate! Love how rich this cake looks!