This chocolate zucchini cake is a moist and decadent dessert that’s both easy to make and utterly satisfying. It’s perfect for families, kid-approved, and an excellent way to sneak in some veggies while enjoying a rich, chocolatey treat!
Table of Contents

The Best Chocolate Zucchini Cake Recipe
Why You’ll Love This Chocolate Zucchini Cake
This cake combines the best of both worlds: the rich flavor of chocolate and the subtle sweetness of zucchini. It’s deeply moist, thanks to the zucchini, and the chocolate chips add delightful bursts of sweetness. Plus, no one will ever guess that there’s a vegetable hidden inside this indulgent dessert!
Ingredients for Moist Chocolate Zucchini Cake
Cake Ingredients
- 2 cups all-purpose flour
- 1 cup unsweetened cocoa powder (sifted)
- 2 teaspoons baking soda
- 1/2 teaspoon salt
- 1 1/2 cups brown sugar
- 3/4 cup vegetable oil, canola oil, or avocado oil
- 1/4 cup melted butter (cooled to room temperature)
- 1/4 cup buttermilk (room temperature)
- 3 large eggs (room temperature)
- 1 1/2 teaspoons vanilla extract
- 2 cups shredded zucchini
- 1 cup chocolate chips
Chocolate Frosting Ingredients
- 1/2 cup unsalted butter (room temperature)
- 3 cups confectioner’s sugar
- 2/3 cup unsweetened cocoa powder
- 1/3 cup milk (heavy cream is an alternative)
- 1 teaspoon vanilla extract
- Pinch of salt
Step-by-Step Guide to Making Chocolate Zucchini Cake
Preparing the Cake Batter
First, preheat your oven to 350°F (175°C) and grease a 9×13-inch pan with nonstick cooking spray. In a medium bowl, whisk together the flour, sifted cocoa powder, baking soda, and salt. In a larger bowl, whisk the brown sugar, oil, melted butter, buttermilk, eggs, and vanilla extract until well combined.
Next, gradually stir the dry ingredients into the wet ingredients until just combined. Be careful not to overmix! Gently squeeze the grated zucchini to remove excess moisture, but retain some liquid. Fold in the zucchini and chocolate chips until just combined.
Baking the Chocolate Zucchini Cake
Pour the batter into the prepared pan and smooth it out with a spatula. Bake for 25-32 minutes, or until a toothpick inserted into the center comes out clean. Once baked, allow the cake to cool completely in the pan.
Making the Chocolate Frosting
While the cake cools, prepare the frosting. Beat the softened butter until smooth. Sift the confectioner’s sugar and cocoa powder together. Gradually add the sugar mixture to the butter while slowly adding milk. Stir in the vanilla and a pinch of salt. Scrape down the sides and beat until the frosting is smooth and fluffy.
Assembling the Cake
Once the cake is completely cool, frost the top generously with the prepared chocolate frosting. Cut into squares and serve this delicious chocolate zucchini cake to your loved ones.
Tips for Perfect Chocolate Zucchini Cake
Zucchini Preparation and Moisture Control

Using fresh zucchini is key. You can use 2 cups of grated zucchini, which is typically one very large or two medium zucchinis. Make sure to squeeze out some moisture but leave a little to keep the cake moist.
Ingredient Temperature Matters
Ensure your eggs and buttermilk are at room temperature. This helps create a uniformly mixed batter that results in a tender cake.
Mixing Techniques for a Tender Cake
After adding the zucchini and chocolate chips, mix just until combined. Overmixing can lead to a tough texture.
Choosing the Right Pan
A metal 9×13-inch pan is recommended for even baking. If you’re feeling adventurous, you can create a layered cake using two round pans.
Storing Your Chocolate Zucchini Cake
Room Temperature Storage
Store the cake covered at room temperature for up to three days. It will stay moist and delicious!
Refrigerator Storage
If you have leftovers, cover the cake and refrigerate it for up to five days. Be sure to bring it back to room temperature before serving for the best flavor.
Freezing for Later
You can freeze the cooled cake by wrapping it in plastic wrap and then foil. It lasts for up to three months. Thaw and frost before serving for a delightful treat.
FAQs
What ingredients do I need for chocolate zucchini cake?
You will need all-purpose flour, unsweetened cocoa powder, baking soda, salt, brown sugar, vegetable oil, melted butter, buttermilk, eggs, vanilla extract, shredded zucchini, and chocolate chips.
How do I make chocolate zucchini cake step by step?
First, prepare the batter by mixing dry and wet ingredients separately, then combine. Fold in zucchini and chocolate chips, pour into a greased pan, and bake. Cool and frost before serving.
Can I make chocolate zucchini cake ahead of time?
Yes, you can make the cake ahead of time. It can be stored at room temperature for a few days or in the refrigerator for up to five days.
How should I store leftover chocolate zucchini cake?
Leftover chocolate zucchini cake can be stored covered at room temperature for up to three days, in the refrigerator for up to five days, or frozen for up to three months.
Related Recipes to try
- Death By Chocolate Zucchini Bread
- Peanut Butter Chocolate Chip Zucchini Cake
- One Bowl Gluten Free Chocolate Zucchini Bread
- Tender Zucchini Bread With Melty Chocolate
- Vegan Double Chocolate Zucchini Bread
- Double Chocolate Zucchini Banana Bread
Conclusion
This chocolate zucchini cake is a delightful way to indulge your sweet tooth while sneaking in some nutritious veggies. For more inspiration, check out Pinterest for endless ideas and recipes to elevate your baking game!

Chocolate Zucchini Cake: A Deliciously Indulgent Treat
Equipment
- skillet
- mixing bowl
- whisk
Ingredients
- Cake:
- 2 cups all-purpose flour
- 1 cup unsweetened cocoa powder sifted
- 2 teaspoons baking soda
- 1 /2 teaspoon salt
- 1 1/2 cups brown sugar
- 3 /4 cup vegetable oil, canola oil, or avocado oil
- 1 /4 cup melted butter cooled to room temperature
- 1 /4 cup buttermilk room temperature
- 3 large eggs room temperature
- 1 1/2 teaspoons vanilla extract
- 2 cups shredded zucchini
- 1 cup chocolate chips
- Frosting:
- 1 /2 cup unsalted butter room temperature
- 3 cups confectioner’s sugar
- 2 /3 cup unsweetened cocoa powder
- 1 /3 cup milk heavy cream is an alternative
- 1 teaspoon vanilla extract
- Pinch of salt
Instructions
- Preheat oven to 350°F (175°C). Grease a 9×13-inch pan with nonstick cooking spray.
- In a medium bowl, whisk together flour, sifted cocoa powder, baking soda, and salt.
- In a large bowl, whisk together brown sugar, oil, melted butter, buttermilk, eggs, and vanilla extract until combined.
- Gradually stir dry ingredients into wet ingredients until just combined; do not overmix.
- Gently squeeze grated zucchini to remove excess moisture, but retain some liquid. Fold in zucchini and chocolate chips until just combined.
- Pour batter into prepared pan and smooth with a spatula. Bake for 25-32 minutes or until a toothpick inserted into the center comes out clean.
- Allow cake to cool completely.
- While cake cools, prepare frosting: Beat butter until smooth. Sift confectioner’s sugar and cocoa powder together. Add sugar mixture to butter, beating while slowly adding milk. Stir in vanilla and salt. Scrape down sides and beat until smooth and fluffy.
- Frost the cooled cake. Cut into squares and serve.
Notes
– Moisture: If zucchini is very wet, squeeze gently, but do not dry completely to maintain cake moisture.
– Ingredients: Ensure eggs and buttermilk are at room temperature. Cool melted butter before adding to wet ingredients.
– Mixing: Do not overmix batter after adding zucchini and chocolate chips.
– Pan: Metal 9×13-inch pan is recommended. Layered cake can be made using two round pans.
– Cooling: Cake must be compl




