Zucchini Double Chocolate Cake

This is the best Chocolate Zucchini Cake, ever. Totally moist, full of amazing flavor, and destined to be your go-to recipe! Even if you just make the cake part of the recipe, you will be blown away by how dense and rich it is!

Zucchini Chocolate Cake

Zucchini Double Chocolate Cake

And while I did add poured chocolate ganache AND piped chocolate ganache… the truth is that this cake really doesn’t need any frosting at all.

All on its own it’s full of rich chocolate flavor and a delicate and glorious crumb.

In spite of its stand-alone amazingness, I went a step further. Well, a couple steps further.

I added not only a beautifully poured ganache but a whipped ganache!

Double Chocolate Zucchini Cake with Chocolate Ganache!

While this recipe is definitely all about the beauty of a perfect chocolate cake, I couldn’t help myself. I was mesmerized by these sweet little whipped ganache stars.

Zucchini Double Chocolate Cake

This is the best Chocolate Zucchini Cake, ever. Totally moist, full of amazing flavor, and destined to be your go-to recipe!

  • 1/2 cup (113g) butter
  • 1/2 cup (99g) vegetable oil
  • 1 3/4 cups (350g) granulated sugar
  • 1 tsp. vanilla extract
  • 1 tsp. baking soda
  • 1/2 tsp. baking powder
  • 1/2 tsp. salt
  • 2 large eggs
  • 1/2 cup buttermilk
  • 2 1/2 cups all-purpose flour
  • 3/4 cup cocoa powder
  • 1/4 cup hot coffee (or espresso)
  • 3 cups shredded zucchini
  • 1 cup chocolate chips


  • 1 cup (225g) whipped cream
  • 2 cups (350g) semi-sweet chocolate chips
  1. Preheat the oven to 325°F. Lightly grease a 9″ x 13″ pan.
  2. In a large mixing bowl, beat together the butter, oil, sugar, vanilla, baking soda, baking powder, and salt until smooth.

  3. Beat in the eggs.
  4. In a small bowl, combine buttermilk and coffee.
  5. Add the buttermilk mixture to the butter mixture alternating with the flour.
  6. Add the cocoa mixing until smooth.
  7. Fold in the zucchini and chocolate chips and then pour batter into pan.
  8. Bake the cake for 30 to 35 minutes, until the top springs back lightly when touched, or center no longer appears wet.


  1. Place the chocolate into a medium bowl. Heat the cream in a small sauce pan over medium heat. Bring just to a boil, watching very carefully so that it does not boil over.

  2. When the cream has come to a boil, pour over the chopped chocolate, and whisk until smooth.
  3. Allow the ganache to cool slightly before pouring over a cake.
  4. Start at the center of the cake and work outward.

Chocolate Zucchini Cake

Tips for Success:

  • Let’s talk zucchini: I typically leave the peeling on because I happen to love seeing little flecks of green through my dessert. You can certainly peel yours if you do not want to see any trace of the vegetable. If you do end up peeling it, people will never know there is zucchini in your cake… unless you tell them of course!
  • When peeling zucchini I try to choose the smallest size on the grater. I also did not drain my zucchini for this recipe. It benefits from all the moisture the zucchini offers. The level of moisture varies depending on the size of the zucchini… the bigger the zucchini the less moisture.
  • I chose a rich, dark, bold coffee. Here is where I am going to be a bit bold myself: No. No, you cannot replace the coffee with hot water. I mean, yes, of course, you can, but NO you do not want to. The cake will not taste like coffee in the slightest, I promise. It simply enhances the chocolate flavor. If you replace the coffee or simply omit it, your cake will not taste as rich.
  • I followed the recipe above for my pourable ganache… but then I made another batch. And when that batch had cooled I whipped it and added 3 cups of powder sugar. Working quickly, I piped the mini stars on top of the cake. (The frosting stiffens the longer it sits.)

PRO TIP: Put the frosting right into a disposable pastry bag for storage as well as easy use!

Cut into Chocolate Zucchini Cake

It is just as moist and rich as you would imagine it to be. More even.

This is definitely my new go-to Zucchini Chocolate Cake!

Can we just look at the frosting again?!?!

Triple Chocolate Zucchini Cake

If you love baking with Zucchini, don’t miss these recipes!

Butterscotch Zucchini Bars

Zucchini Cake Recipe

Zucchini Brownies (one of my most popular recipes!)

Chocolate Chip Zucchini Cookies

Double Chocolate Zucchini Cupcakes

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