Chocolate Zucchini Cake

filed under: Cakes on May 8, 2018

Amazingly rich and decadent, this Chocolate Zucchini Cake is what all chocolate cakes should strive to be.


4.78 from 9 votes
Chocolate Zucchini Cake
Prep Time
15 mins
Cook Time
50 mins
Total Time
1 hr 5 mins

Amazingly rich and decadent, this Chocolate Zucchini Cake is what all chocolate cakes should strive to be.

Course: Dessert
Cuisine: American
Keyword: chocolate zucchini cake
Servings: 4 servings
  • 2 cups (400 g) sugar
  • 4 eggs
  • 1 tsp vanilla
  • 1 1/2 cups (335 g) vegetable oil
  • 2 cups (250 g) all-purpose flour
  • 3/4 cups (95 g) unsweetened cocoa powder
  • 2 tsp (14 g) baking soda
  • 1 tsp (4 g) baking powder
  • 3 cups (450 g) zucchini grated
  • 1/2 cup (350 g) chocolate simple syrup
  1. Preheat oven to 350°F.

  2. In a medium bowl, stir together the sugar, eggs, vanilla, vegetable oil. Add in flour, cocoa powder, baking soda, and baking powder.  Mix well.  

  3. Fold in zucchini until it is evenly distributed. 

  4. Pour mixture into a prepared 9x13 pan

  5. Bake 40-50 minutes

  6. Remove from oven, pierce with a fork, and drizzle about 1/2 cup of chocolate simple syrup over top. 
  7. Allow cake time to set.

Recipe Video



Chocolate Zucchini Cake

I have received some backlash for putting zucchini in a cake, but I happen to love zucchini.  In bread, in cookies, on my dinner plate, and yes, even in my cakes.  If you are not a fan of zucchini, don’t leave just yet.  Now, if you don’t like chocolate you can go.  See ya (what are you even doing here, to begin with?).  If you do love chocolate, you are still in the safe zone.  The zucchini blends right into the cake and adds so much moisture, you won’t even know its there.

Baking with Zucchini

When using zucchini in recipes there are a couple tips & tricks help to make sure your baked goods are perfect!

-Use the fine side of your grater. Coarser pieces will have a slightly more noticeable flavor and texture in a finished cake or bread recipe. (Farm kids tend to want that!)

-Some recipes ask that the zucchini is pressed well with a clean towel to soak up excess moisture or to prevent whatever your baking from getting too soggy. Pay close attention to the recipe that you are making with zucchini as the level of moisture they provide is important. For instance, in this recipe, the zucchini is the main source of moisture and shouldn’t be drained.

Simple Syrup for Chocolate Cake

Chocolate Simple Syrup

I do something a little special when I make this chocolate zucchini cake recipe.  It is my little secret weapon chocolate simple syrup.  I bake, all of the time, so I keep some of this on hand, all of the time.  It holds for up to two weeks.  If you aren’t like me, you can whip some of this stuff up in under 10 minutes.  Its easy and it is WORTH IT!  Simple Syrup keeps the cake moist throughout every stage of assembly and decoration and it adds a slight sweetness which is always good!

Easy Chocolate Zucchini Cake

The Cholocate Simple Syrup puts this recipe over the top amazing and adds a shiny crust to the top.  Just look at that! You are going to love this cake, trust me!

Chocolate Zucchini cake is good on its own, but if you are looking for a decadent frosting for the top, I recommend Cream Cheese Frosting.

Chocolate Zucchini Cake Recipe

Sidenote: You can absolutely serve this cake without simple syrup, it is still amazingly delicious. However, I wouldn’t change the amounts of ingredients. I made this cake with half the oil and it was not as good. I made it with less sugar and it was inferior. I made it with cinnamon and it was kinda weird tasting. I made every which way you could think and THIS recipe for Chocolate Zucchini Cake is perfect as is! 🙂

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  • Carol Price says:

    How much is the cook book

  • Sheila says:

    Can I make this cake in its original recipe without the zucchini? My children love a moist chocolate cake. Thanks

  • Jenny says:

    I made this recipe but super healthy style (because we were out of flour and sugar and oil). I made it with coconut flour (same amount) and coconut sugar (same amount) and substituted vegetable oil with half that amount in applesauce (3/4cup) and it was so good that my kids beg me to make it! It was a little closer to a brownie density than a cake. We didn’t put on any syrup!

  • Julie Patrick says:

    Your recipe for chocolate zucchini cake is absolutely amazing!!! I did substitute olive oil for the vegetable oil but the cake was so-o-o moist and light it was devoured before any frosting was made. I have another one in the oven & this one will be frosted. Thanks for the GREAT recipe, will mark as one of my favorites. Thanks again~Julie

  • Diane Day says:

    Made this recipe and exchanged 1 cup of oil for 1 cup applesauce. Also, I threw in some dairy free chocolate chips because I didn’t want to make the simple sugar. Turned out great! Plus, no dairy and no corn as I have family that have food sensitivities.
    Loved it that it used 3 cups zucchini.

    • Sherrie Female Gil says:

      I was wondering where you get the dairy free chocolate chips. I am severely lactose intolerant. Would love to use them. Thanks in advance.

  • Ronnie Taulbee says:

    I love all the recipes you post!


  • Alamsyah says:

    Its look yummy…hmm….I love it..😍😍😍😍😍

  • Marybeth Suiter says:

    Love all things zucchini I’ll try it soon do you have a recipe for zucchini nut muffins can you share it please also any recipe for gaspacho soup?

    • Amanda Rettke says:

      You could absolutely try that!

  • Terri Hayes says:

    Where do I find or how do I make the chocolate simple syrup?

  • Kamel says:

    Bravo jador t’es recettes bonne continuation

  • Kim Sbraccia says:

    How do you make chocolate simple syrup?

  • Sue says:

    Looks delicious. How do you make the chocolate simple syrup? I’m anxious to try this recipe.

  • Jane Dunn says:

    How do you make the chocolate simple syrup?

  • Debi Lewis says:

    This is a tasty recipe; however, I did add a half teaspoon of salt! Thank you for posting this!! 😋

  • Hiba says:

    Thank you,
    Great idea
    I was about to suggest adding less sugar until i reached the kast paragraph. Anyway, i am excited to make it.
    Thank you

  • mike corsello says:

    Why didn’t you include the recipe and instructions for the simple sypup?

  • connie says:

    I would like your chocolate simple syrup receipt. Can I use Hersey’s?

  • Linda cole says:

    Great recipes

  • Carolyn Bonnette says:

    where do I get chocolate simple syrup?

  • Kari says:

    The simple syrup recipe is in the post. Click on the Chocolate Simple Syrup and it takes you right to the recipe.

  • Jennifer says:

    I like your cakes can get some your recipe to try and bake have been baking but i do not have wonderful recipe like you . Help me to improve.

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