This moist chocolate zucchini cake is rich, fudgy, and easy to make from scratch. Finely shredded zucchini adds moisture to the cake while cocoa powder and chocolate chips create a deep chocolate flavor. Best of all, the zucchini blends into the cake, so even picky eaters may not notice it.
Prep time: 20 minutes
Bake time: 40–50 minutes
Servings: 12–16 slices
Pan: 9 × 13-inch baking pan
Why You’ll Love This Chocolate Zucchini Cake
Moist and Fudgy Texture
Fresh zucchini contains plenty of moisture, which helps create a soft and tender crumb. For the best texture, use finely shredded zucchini and lightly blot it with a clean kitchen towel if it seems extremely wet.
Do not squeeze the zucchini completely dry. The natural moisture helps keep the chocolate zucchini cake moist as it bakes.
Rich Chocolate Flavor
Unsweetened cocoa powder gives this cake its deep chocolate taste, while semi-sweet chocolate chips add little pockets of melted chocolate throughout the crumb.
For an even more intense chocolate flavor, add 1 teaspoon of espresso powder to the dry ingredients. The espresso powder does not make the cake taste like coffee; it simply enhances the cocoa flavor.
Easy One-Bowl Preparation
This easy chocolate zucchini cake does not require complicated equipment. You can mix the batter by hand using a large bowl, a whisk, and a rubber spatula.
The key is to mix the batter only until the ingredients are combined. Overmixing can make the finished cake dense instead of soft and tender.
Ingredients You’ll Need
Essential Cake Ingredients
- 2 cups all-purpose flour.
- ¾ cup unsweetened cocoa powder.
- 2 teaspoons baking soda.
- ½ teaspoon baking powder.
- ½ teaspoon salt.
- 1 cup vegetable oil or canola oil.
- 1 cup granulated sugar.
- ¾ cup light brown sugar.
- 4 large eggs, preferably at room temperature.
- ½ cup sour cream or plain Greek yogurt.
- 2 teaspoons vanilla extract.
- 3 cups finely shredded zucchini.
- 1 cup semi-sweet chocolate chips.
Comparable chocolate zucchini cake recipes commonly use cocoa powder, shredded zucchini, oil, eggs, sour cream or yogurt, and chocolate chips to create a moist and rich cake.sallysbakingaddiction+2
How to Prepare the Zucchini
Wash the zucchini well and trim off both ends. There is no need to peel it because the skin becomes very soft during baking.
Use the small or medium holes of a box grater to shred the zucchini. If the shreds are very long, cut them into shorter pieces with a knife so they distribute evenly through the batter.
Place the shredded zucchini on paper towels or in a clean kitchen towel and gently blot away excess liquid. Do not press it completely dry unless it is releasing an unusually large amount of water.
Optional Chocolate Additions
You can customize the cake with any of the following additions:
- Chopped dark chocolate.
- White chocolate chips.
- Chopped walnuts or pecans.
- 1 teaspoon espresso powder.
- ½ teaspoon ground cinnamon.
- A pinch of cayenne pepper for a subtle spicy note.
If you add nuts, keep the total amount of chocolate chips and nuts to approximately 1½ cups so the batter remains balanced.
How to Make Chocolate Zucchini Cake
Prepare the Pan and Batter
Preheat your oven to 350°F, or 177°C. Grease a 9 × 13-inch baking pan and line the bottom with parchment paper if you want to remove the cake easily.
In a medium bowl, whisk together the flour, cocoa powder, baking soda, baking powder, and salt. Add the espresso powder at this stage if you are using it.
In a separate large bowl, whisk the oil, granulated sugar, brown sugar, eggs, sour cream, and vanilla extract until smooth. Stir in the shredded zucchini.
Add the dry ingredients to the wet ingredients. Use a rubber spatula to stir gently until no large streaks of flour remain.
Fold in the Zucchini and Chocolate Chips
Fold the chocolate chips into the batter, reserving a small handful to sprinkle over the top if desired.
The batter will be fairly thick. This is normal, but it should still spread easily into the prepared pan. If the zucchini is especially dry, the batter may be slightly thicker than expected.
Spread the batter evenly in the pan. Smooth the surface with a spatula and sprinkle the reserved chocolate chips over the top.
Bake and Cool the Cake
Bake the chocolate zucchini cake for approximately 40–50 minutes. Begin checking it at the 40-minute mark because baking times can vary between ovens and pans.
The cake is ready when the center looks set and a toothpick inserted into the middle comes out with a few moist crumbs. It should not have wet batter attached to it. Similar 9 × 13-inch recipes use baking temperatures between 325°F and 350°F, with baking times varying according to the recipe and pan.kingarthurbaking+2
Let the cake cool completely in the pan before frosting or slicing. Cutting it while hot can make the center appear gummy and may cause the slices to fall apart.
Tips, Variations, and Frosting Ideas
Tips for a Moist Chocolate Zucchini Cake
Measure the flour correctly by spooning it into a measuring cup and leveling the top. Adding too much flour can make the cake dry.
Use unsweetened cocoa powder rather than sweetened drinking chocolate. Cocoa powder provides a stronger chocolate flavor and helps maintain the correct sugar balance.
Avoid overmixing after adding the flour. Stir only until the batter comes together.
Do not overbake the cake. Remove it when a toothpick shows a few moist crumbs, rather than waiting until the toothpick is completely dry.
Chocolate Frosting Options
For a simple topping, dust the cooled cake with powdered sugar. You can also serve each slice with whipped cream or vanilla ice cream.
For chocolate cream cheese frosting, beat together softened cream cheese and butter until smooth. Add powdered sugar, cocoa powder, vanilla extract, and a small amount of milk until the frosting reaches a spreadable consistency.
A pourable chocolate ganache is another excellent choice. Melt semi-sweet chocolate with warm heavy cream, stir until smooth, and let it cool slightly before spreading it over the cake.
Recipe Variations
To make a chocolate zucchini sheet cake, keep the same batter and bake it in the 9 × 13-inch pan.
For a chocolate zucchini bundt cake, grease and flour the bundt pan thoroughly. The baking time may change, so begin checking the cake when it looks set and a toothpick inserted into the thickest part comes out with moist crumbs.
For a gluten-free version, use a tested gluten-free flour blend designed for baking. For a dairy-free version, replace the sour cream with dairy-free yogurt and use dairy-free chocolate chips.
Serving, Storage, and FAQs
How to Serve the Cake
Serve this moist chocolate zucchini cake at room temperature so the crumb is soft and the chocolate flavor is easy to enjoy.
You can decorate it with chocolate frosting, chocolate shavings, chopped nuts, or a light dusting of powdered sugar.
This cake works well as a summer dessert, afternoon snack, birthday cake, or simple treat for using up garden zucchini.
How to Store and Freeze It
Store the unfrosted cake in an airtight container at room temperature for up to 3 days. If the cake has cream cheese frosting, cover it and refrigerate it according to the requirements of the frosting ingredients.
To freeze the cake, allow it to cool completely and cut it into individual slices. Wrap each slice tightly in plastic wrap, place the slices in a freezer-safe container, and freeze for up to 1 month for the best quality.
Thaw the slices in the refrigerator overnight or at room temperature for several hours. Freezing unfrosted slices can help preserve the texture more effectively than freezing a fully decorated cake.handletheheat+1
Frequently Asked Questions
Can you taste the zucchini in chocolate zucchini cake?
No, the zucchini should have a very subtle flavor when it is finely shredded. The cocoa powder, vanilla, and chocolate chips provide the dominant flavor.
Do you need to peel the zucchini?
No. The peel is tender and adds color, but it softens during baking.
Should you squeeze the water out of shredded zucchini?
Lightly blot very wet zucchini, but do not remove all of its moisture. The liquid helps create a moist cake.
Can you make this cake without a mixer?
Yes. A whisk and rubber spatula are enough to prepare the batter.
Can you add chocolate chips?
Yes. Semi-sweet chocolate chips, dark chocolate chips, or chopped chocolate all work well in this recipe.
How do you know when the cake is done?
Insert a toothpick into the center. It should come out with a few moist crumbs but no wet batter.
Can chocolate zucchini cake be frozen?
Yes. For the best result, freeze cooled, unfrosted slices in an airtight freezer-safe container.
Meta description: Make this moist and easy chocolate zucchini cake with shredded zucchini, cocoa powder, and chocolate chips. A rich homemade dessert with a soft, fudgy crumb.
Chocolate Zucchini Cake: Moist and Easy Recipe
Instructions
- Preheat the oven to 350°F, or 177°C. Grease a 9 × 13-inch baking pan and line the bottom with parchment paper if desired.
- Wash and trim the zucchini. Finely shred it using a box grater. Gently blot excess moisture with a clean kitchen towel, but do not squeeze the zucchini completely dry.
- In a medium bowl, whisk together the flour, cocoa powder, baking soda, baking powder, and salt.
- In a large mixing bowl, whisk together the vegetable oil, granulated sugar, brown sugar, eggs, sour cream, and vanilla extract until smooth.
- Stir the shredded zucchini into the wet ingredients.
- Add the dry ingredients to the wet mixture. Gently stir with a rubber spatula until just combined. Do not overmix.
- Fold in the chocolate chips, reserving a few to sprinkle over the top if desired.
- Spread the batter evenly into the prepared baking pan.
- Bake for 40–50 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs but no wet batter.
- Place the cake on a cooling rack and let it cool completely before slicing or adding frosting.
- Serve plain, dusted with powdered sugar, or topped with chocolate frosting or chocolate ganache.
Notes
- Do not peel the zucchini before shredding.
- Lightly blot very wet zucchini, but keep some moisture for a tender cake.
- Avoid overmixing the batter because it can make the cake dense.
- Store the unfrosted cake in an airtight container at room temperature for up to 3 days.
- Freeze individual unfrosted slices in a freezer-safe container for up to 1 month.
