Chocolate Zucchini Sheet Cake

Highlighted under: Artisanal Baking Recipes

Indulge in this moist and delicious Chocolate Zucchini Sheet Cake, perfect for chocolate lovers and a great way to use up extra zucchini!

Anna

Created by

Anna

Last updated on 2025-12-20T12:09:50.099Z

This Chocolate Zucchini Sheet Cake is a delightful combination of rich chocolate and hidden vegetables, making it a guilt-free treat!

Why You'll Love This Recipe

  • Rich chocolate flavor paired with fresh zucchini
  • Moist texture that keeps you coming back for more
  • Perfect for potlucks, parties, or as a sweet everyday dessert

The Secret to Moistness

One of the standout features of this Chocolate Zucchini Sheet Cake is its incredible moistness. The grated zucchini not only adds a subtle flavor but also contributes to a tender crumb that keeps each bite delightful. As zucchini has a high water content, it helps prevent the cake from drying out, ensuring that it remains soft and fluffy for days. You won’t even realize there’s a vegetable hidden in this rich chocolate treat!

To ensure the best results, make sure to properly drain the grated zucchini before adding it to the batter. Excess moisture can alter the cake's texture, leading to a soggy outcome. After grating, simply place the zucchini in a clean kitchen towel and squeeze out any excess liquid. This will enhance the cake's overall structure and maintain that sought-after moistness.

Serving Suggestions

This Chocolate Zucchini Sheet Cake is versatile and can be served in various ways. It's a fantastic dessert for casual family dinners, birthday parties, or even as a sweet addition to potluck gatherings. Cut into squares or rectangles, it’s easy to serve and share, making it an ideal choice for larger groups.

For an extra touch, consider garnishing each slice with a sprinkle of chocolate shavings or a dusting of cocoa powder. You can also add a scoop of vanilla ice cream or a dollop of whipped cream on the side for a delightful contrast to the rich chocolate flavor. No matter how you serve it, this cake is sure to impress and satisfy!

Storage Tips

If you find yourself with leftovers (though that's unlikely!), storing your Chocolate Zucchini Sheet Cake is simple. Allow the cake to cool completely before transferring it to an airtight container. It can be stored at room temperature for up to three days, or in the refrigerator for about a week. Just ensure it’s well-covered to maintain its moist texture.

For longer storage, this cake freezes beautifully. Wrap individual slices or the entire cake tightly in plastic wrap followed by aluminum foil and pop it in the freezer. When you're ready to enjoy it again, simply thaw in the refrigerator overnight. It’ll taste as fresh as the day it was baked!

Ingredients

For the Cake

  • 2 cups grated zucchini (about 2 medium zucchinis)
  • 1 ¾ cups all-purpose flour
  • 1 cup granulated sugar
  • ½ cup unsweetened cocoa powder
  • 1 tsp baking soda
  • ½ tsp baking powder
  • ½ tsp salt
  • 1 tsp vanilla extract
  • ½ cup vegetable oil
  • 3 large eggs

For the Frosting

  • ½ cup unsalted butter, softened
  • 2/3 cup unsweetened cocoa powder
  • 3 cups powdered sugar
  • 1/3 cup milk
  • 1 tsp vanilla extract

Make sure to wash and grate the zucchinis before starting.

Instructions

Prepare the Zucchini

Preheat your oven to 350°F (175°C). Grate the zucchini and set it aside to drain excess moisture.

Mix Dry Ingredients

In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt.

Combine Wet Ingredients

In another bowl, beat together the eggs, vegetable oil, and vanilla extract until smooth.

Combine Mixtures

Gradually add the wet mixture to the dry ingredients, mixing until just combined. Fold in the grated zucchini.

Bake the Cake

Pour the batter into a greased and floured sheet cake pan. Bake for 30 minutes or until a toothpick inserted in the center comes out clean.

Prepare the Frosting

While the cake cools, beat the butter with cocoa powder in a bowl. Gradually add powdered sugar and milk, mixing until smooth. Stir in vanilla.

Frost the Cake

Once the cake is completely cool, spread the frosting evenly over the top. Cut into squares and serve.

Enjoy your delicious Chocolate Zucchini Sheet Cake!

Frequently Asked Questions

Is it necessary to peel the zucchini before grating? No, you don’t need to peel the zucchini for this recipe. The skin is packed with nutrients and adds to the cake's texture. Just make sure to wash it thoroughly before grating.

Can I use whole wheat flour instead of all-purpose flour? Yes, you can substitute whole wheat flour for all-purpose flour for a healthier option. Just keep in mind that it may slightly change the texture and flavor, making the cake a bit denser.

Variations to Try

Feel free to experiment with different mix-ins! Adding chocolate chips or nuts can elevate the flavor and texture of the cake. Dark chocolate chips complement the cake’s richness, while chopped walnuts or pecans add a delightful crunch.

For a hint of spice, consider incorporating a teaspoon of cinnamon or a dash of nutmeg into the batter. This will give your Chocolate Zucchini Sheet Cake a warm, inviting flavor that’s perfect for fall or winter gatherings.

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Questions About Recipes

→ Can I use frozen zucchini for this recipe?

Yes, just make sure to thaw and drain it well before using.

→ How should I store leftovers?

Store in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.

→ Can I make this cake gluten-free?

Yes, you can substitute the all-purpose flour with a gluten-free flour blend.

→ How can I make the cake more chocolatey?

You can add chocolate chips to the batter or use dark cocoa powder for a richer flavor.

Chocolate Zucchini Sheet Cake

Indulge in this moist and delicious Chocolate Zucchini Sheet Cake, perfect for chocolate lovers and a great way to use up extra zucchini!

Prep Time20 minutes
Cooking Duration30 minutes
Overall Time50 minutes

Created by: Anna

Recipe Type: Artisanal Baking Recipes

Skill Level: Easy

Final Quantity: 12 servings

What You'll Need

For the Cake

  1. 2 cups grated zucchini (about 2 medium zucchinis)
  2. 1 ¾ cups all-purpose flour
  3. 1 cup granulated sugar
  4. ½ cup unsweetened cocoa powder
  5. 1 tsp baking soda
  6. ½ tsp baking powder
  7. ½ tsp salt
  8. 1 tsp vanilla extract
  9. ½ cup vegetable oil
  10. 3 large eggs

For the Frosting

  1. ½ cup unsalted butter, softened
  2. 2/3 cup unsweetened cocoa powder
  3. 3 cups powdered sugar
  4. 1/3 cup milk
  5. 1 tsp vanilla extract

How-To Steps

Step 01

Preheat your oven to 350°F (175°C). Grate the zucchini and set it aside to drain excess moisture.

Step 02

In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt.

Step 03

In another bowl, beat together the eggs, vegetable oil, and vanilla extract until smooth.

Step 04

Gradually add the wet mixture to the dry ingredients, mixing until just combined. Fold in the grated zucchini.

Step 05

Pour the batter into a greased and floured sheet cake pan. Bake for 30 minutes or until a toothpick inserted in the center comes out clean.

Step 06

While the cake cools, beat the butter with cocoa powder in a bowl. Gradually add powdered sugar and milk, mixing until smooth. Stir in vanilla.

Step 07

Once the cake is completely cool, spread the frosting evenly over the top. Cut into squares and serve.

Nutritional Breakdown (Per Serving)

  • Calories: 380 kcal
  • Total Fat: 26g
  • Saturated Fat: 15g
  • Cholesterol: 195mg
  • Sodium: 85mg
  • Total Carbohydrates: 32g
  • Dietary Fiber: 3g
  • Sugars: 24g
  • Protein: 6g