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.

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

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

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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  • Jean Crowder-Gonzales says:

    Did you try this with Splenda?

  • jane Lombard says:

    what is chocolate simple syrup ??

  • Neeva Leibowitz says:

    How do I make Chocolate simple syrup?
    What is the sugar and carbs contain? My husband is diabetic and I can adjust sugar accordingly

  • Bernadette says:

    Your link to the Chocolate Simple Syrup isn’t working. Can you provide the recipe for the chocolate simple syrup?

  • Kate says:

    Can’t wait to try this! What is the recipe for the chocolate simple syrup? Also, could you use coconut sugar?

  • Diann DiBenedetto says:

    I want to thank you for all of your wonderful looking recipes. I love seeing them on facebook. I’m going to try this cake and chocolate simple syrup right now!!

  • Susan hudson says:

    I make zucchini bread with crushed pineapple, raisins & chopped pecans. Ìt is awesome! I just picked zucchini out of my garden , I will make this choc zucchini cake instead. It sounds delicious. Thanks for the recipe!

  • Arlene Goins says:

    Looks like a fabulous recipe but need the recipe for Simple Syrup. No luck withthe link

  • S bailey says:

    How do I make chocolate simple syrup?

    • Valerie Abrams Forman says:

      Simple means as I took it chocolate syrup like you would buy to make chocolate milk.

  • paulette says:

    where is the chocolate syrup recipe cannot fond it

  • Kathleen says:

    Do you drain/squeeze dry the grated zucchini before adding to batter?

  • Tina Harnischfeger says:

    I made the cake and 30-40 minutes baking time was nowhere near enough. I’m also confused because it says 50 minutes baking time on the top of the instructions but 30-40 minutes in the written notes.

    Mine took about 50 minutes and the cake was still pretty wet inside.

    The taste was great, though.

  • Marie says:

    Honestly, I didn’t love the cake. I used half a cup less sugar because I thought the syrup would make the cake overly sweet but even with the reduction, all I could taste was the sugar in the syrup. It didn’t taste like chocolate at all, only sweet.

    Sorry, I usually love the recipes on this website but I won’t be making this cake again.

    • Amanda says:

      I’m sorry you didn’t enjoy the recipe after you made changes to it.

    • BrendaM says:

      The author stated that she tried the recipe with less sugar and it was inferior, so it’s not really fair to say that the recipe wasn’t good when you did exactly what she suggested you shouldn’t.

      • Amanda says:

        Thanks Brenda!

  • Bev says:

    Made the chocolate zucchini cake with chocolate syrup today. Absolutely delicious! I give it 10 stars! Thanks so much for sharing this recipe.

  • Beverly Green says:

    This cake with chocolate syrup is absolutely delicious! Thanks for sharing the recipe.

    • Amanda says:

      You are welcome! Glad you enjoyed!

  • hodaya says:

    You have the right to put zucchini if ​​you like, and for those who do not feel good about not making this cake, do not make a silly talking movie

  • Nicole says:

    i made this and wondered why no salt was in the recipe so i added a half of a teaspoon. wished i had added more. great cake but needs just a little more saltiness to bring out the chocolate more. my daughter didnt seem to mind though and she has no idea that it has zuchinni in it cause i grated it with a thin grater after i peeled the green skins off. hehehehe

  • Ann says:

    Needs salt!!!!! Otherwise very moist and light!

  • Barbara says:

    Do you squeeze the liquid out of zucchini before yu put into batter?

  • Lallie says:

    I have a ? What about substituting a nutbased flour and using Stevia instead of sugar?

  • Elaine says:

    I was also wondering if you need to squeeze the excess moisture from the zucchini?

  • sandra l wilson says:

    What is the recipe for the chocolate syrup?

  • Nancy Rhodes says:

    Very very Delious will make it again and again

  • Bev C says:

    The recipe for the Chocolate Simple Syrup is in the above article! Click on the words just under the photo of the cake. Or:

  • Dana b. Otayco says:

    Is there any substitute if there is no zucchini?

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