Mary Berry Chocolate Courgette Cake Recipe

Personal Introduction

The Mary Berry Chocolate Courgette Cake Recipe was not something I planned to make the first time around. I actually had a couple of zucchini sitting in my fridge that needed to be used before they got soft and sad-looking. I had already made zucchini bread more times than I could count, and honestly, I was getting tired of it.

A friend mentioned chocolate zucchini cake, and after a little digging, I came across the Mary Berry version. I was skeptical at first. Chocolate and zucchini? It sounded a little strange. The first time I made this cake, I kept checking the batter because it looked thicker than I expected. I was convinced I had messed something up.

Turns out, I hadn’t.

The cake came out incredibly moist, rich, and chocolatey. Nobody in my house guessed there was zucchini in it. My husband actually asked if it was a bakery cake, which almost never happens. Since then, I’ve made this recipe several times, especially when zucchini is plentiful during the summer months.

What I like most is that it doesn’t feel overly sweet. The zucchini adds moisture without making the cake heavy, and the chocolate flavor stays front and center. If you’re looking for a homemade chocolate cake with a little something extra, this Mary Berry Chocolate Courgette Cake Recipe is worth trying.

Why This Recipe Works

There are plenty of chocolate zucchini cakes out there, but this one stands out for a few practical reasons.

First, the zucchini keeps the cake moist for days. You don’t need a ton of butter or oil to get that soft texture.

Second, the cocoa powder provides a deep chocolate flavor without making the cake overly rich. The balance feels just right.

Another thing I noticed is that the grated zucchini practically disappears into the batter. You get the moisture benefits without noticeable vegetable pieces in every bite.

The cake also has a tender crumb. It stays soft whether you’re serving it fresh or pulling a slice from the fridge the next day.

Finally, it freezes surprisingly well. I’ve made extra batches and stored slices for busy weeks when I wanted a quick dessert with coffee.

Equipment Needed

You won’t need any fancy baking tools for this recipe.

• Large mixing bowl
• Medium mixing bowl
• Measuring cups
• Measuring spoons
• Box grater
• Knife
• Cutting board
• Wooden spoon or silicone spatula
• Small pot
• 9-inch round cake pan or springform pan
• Cooling rack
• Whisk

Recipe Card

Mary Berry Chocolate Courgette Cake Recipe

Prep Time: 20 minutes

Cook Time: 40 minutes

Total Time: 1 hour

Servings: 12 slices

Cuisine: British-Inspired Home Baking

Course: Dessert

Calories: Approximately 380 calories per serving

Ingredients

For the Cake

• 2 cups grated zucchini (courgette)
• 1 ¾ cups all-purpose flour
• ½ cup unsweetened cocoa powder
• 2 teaspoons baking powder
• ½ teaspoon baking soda
• ¼ teaspoon salt
• ¾ cup granulated sugar
• ¾ cup light brown sugar
• 2 large eggs
• ½ cup vegetable oil
• 1 teaspoon vanilla extract
• 3 ounces dark chocolate, melted and cooled slightly

For the Chocolate Frosting

• 4 ounces dark chocolate
• 4 tablespoons unsalted butter
• 2 tablespoons milk
• 1 ½ cups powdered sugar

Step-by-Step Instructions

Step 1: Prepare the Oven and Pan

Start by preheating your oven to 350°F. Grease a 9-inch cake pan and line the bottom with parchment paper if possible.

I learned the hard way that chocolate cakes can sometimes stick, even when you think you’ve greased the pan enough. The parchment gives a little insurance policy and makes removing the cake much easier.

Step 2: Grate the Zucchini

Wash and dry the zucchini. Trim off the ends and grate it using the large holes of a box grater.

You don’t need to peel the zucchini. The skin softens during baking and blends right into the cake. Don’t squeeze all the moisture out either. That moisture is part of what makes this cake so soft.

Set the grated zucchini aside while you prepare the batter.

Step 3: Mix the Dry Ingredients

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

Take a minute to break up any cocoa powder lumps. I skipped this step once and ended up with little pockets of cocoa in the finished cake. It wasn’t terrible, but it wasn’t ideal either.

The mixture should look evenly blended with a rich brown color.

Step 4: Mix the Wet Ingredients

In a large mixing bowl, combine the granulated sugar, brown sugar, eggs, vegetable oil, and vanilla extract.

Whisk until the mixture becomes smooth and slightly lighter in color. This usually takes about two minutes.

Pour in the melted chocolate and stir until fully incorporated. The batter will begin looking glossy and chocolate-rich at this point.

Step 5: Combine Wet and Dry Ingredients

Gradually add the dry ingredients to the wet mixture.

Use a spatula or wooden spoon and mix just until combined. Try not to overwork the batter.

At first it may seem slightly thick, but that’s normal.

Step 6: Fold in the Zucchini

Add the grated zucchini and gently fold it into the batter.

This is where the texture changes. As the zucchini releases moisture, the batter becomes easier to stir and slightly looser.

Make sure the zucchini is evenly distributed throughout the mixture.

Step 7: Bake the Cake

Pour the batter into the prepared pan and smooth the top.

Bake for 38 to 42 minutes.

Around the 30-minute mark, your kitchen will start smelling deeply chocolatey. The top should look set and slightly springy when lightly touched.

Insert a toothpick into the center. A few moist crumbs are fine, but you shouldn’t see wet batter.

Remove the cake from the oven and allow it to cool in the pan for 15 minutes before transferring it to a wire rack.

Step 8: Make the Frosting

Place the chocolate, butter, and milk in a small pot over low heat.

Stir continuously until everything melts together into a smooth mixture.

Remove from the heat and gradually whisk in the powdered sugar until smooth.

Let the frosting cool slightly. It should thicken enough to spread easily without running down the sides.

Step 9: Frost the Cake

Once the cake is completely cool, spread the frosting evenly over the top.

Use the back of a spoon to create simple swirls if you’d like.

I rarely worry about making it look perfect. A homemade cake should look homemade.

Step 10: Serve

Allow the frosting to set for about 15 minutes before slicing.

The cake cuts cleanly and reveals a soft, moist interior with a rich chocolate color.

Common Mistakes to Avoid

Using Too Much Zucchini

Packing grated zucchini too tightly into measuring cups can add excess moisture and make the cake dense.

Overmixing the Batter

Too much stirring develops gluten and can make the cake tougher than intended.

Frosting a Warm Cake

This one gets people all the time. If the cake is still warm, the frosting melts and slides around.

Skipping the Pan Preparation

Chocolate cakes are notorious for sticking. Greasing and lining the pan saves frustration later.

Overbaking

A few extra minutes can dry out the cake. Start checking for doneness around 38 minutes.

Pro Tips

• Use freshly grated zucchini instead of pre-shredded packaged zucchini.
• Room-temperature eggs blend more smoothly into the batter.
• Let the cake cool completely before frosting.
• For deeper chocolate flavor, use high-quality cocoa powder.
• Store overnight before serving if possible. I noticed the flavor actually improves by the next day.
• Add a pinch of espresso powder to boost the chocolate flavor without making the cake taste like coffee.

Variations

Chocolate Chip Version

Fold 1 cup semi-sweet chocolate chips into the batter before baking.

Walnut Chocolate Cake

Add ¾ cup chopped walnuts for crunch and texture.

Cream Cheese Frosting

Swap the chocolate frosting for a tangy cream cheese frosting.

Cupcake Version

Divide the batter into lined muffin tins and bake for about 18 to 22 minutes.

Double Chocolate Version

Mix chocolate chunks into the batter and drizzle melted chocolate over the frosting.

Serving Ideas

• Serve with vanilla ice cream.
• Pair with hot coffee in the morning.
• Add fresh strawberries on the side.
• Enjoy with a cold glass of milk.
• Serve alongside whipped cream.
• Pair with fresh raspberries.
• Add a light dusting of powdered sugar.
• Serve slightly chilled during warm weather.

Make-Ahead Tips

This cake works very well as a make-ahead dessert.

You can bake the cake a day in advance and leave it covered at room temperature. The texture actually becomes even more moist overnight.

The frosting can also be prepared a day ahead and stored in the refrigerator. Just bring it back to room temperature before spreading.

For longer storage, wrap the unfrosted cake tightly in plastic wrap and freeze it for up to three months.

When ready to serve, thaw overnight in the refrigerator and frost the next day.

Storage & Reheating Tips

Store leftover cake in an airtight container at room temperature for up to three days.

For longer storage, keep it refrigerated for up to one week.

If refrigerated, let slices sit at room temperature for about 20 minutes before serving. The texture softens nicely.

Individual slices can be frozen in airtight containers or freezer bags for up to three months.

Because this is a moist cake, reheating isn’t usually necessary. If you prefer a slightly warm slice, microwave for about 10 to 15 seconds.

Frequently Asked Questions

Can you taste the zucchini in this cake?

Not really. The zucchini mainly provides moisture. Most people won’t know it’s there unless you tell them.

Should I peel the zucchini first?

No. The peel softens during baking and blends into the cake without affecting texture.

Can I make the Mary Berry Chocolate Courgette Cake Recipe ahead of time?

Absolutely. In fact, many people find the flavor improves after resting overnight.

Can I freeze this cake?

Yes. Freeze either whole or in individual slices for up to three months.

Why is my cake too dense?

Common causes include overmixing the batter, using too much zucchini, or overpacking the flour measurement.

Can I use milk chocolate instead of dark chocolate?

You can, but the cake will be sweeter and have a milder chocolate flavor.

Final Thoughts

The Mary Berry Chocolate Courgette Cake Recipe has become one of those recipes I come back to throughout the year. It uses simple ingredients, stays moist for days, and delivers a rich chocolate flavor without feeling overly heavy.

The first time I made it, I wasn’t completely convinced that zucchini belonged in a chocolate cake. After one slice, I changed my mind pretty quickly. What worked better for me was trusting the process and not worrying about the vegetable hiding in the batter.

If you have extra zucchini sitting in the fridge and you’re tired of making the same old bread, give this Mary Berry Chocolate Courgette Cake Recipe a try. It’s easy enough for a weekend baking project, and the results are the kind of homemade dessert people keep coming back for another slice of.

Between the soft crumb, rich frosting, and simple preparation, it’s easy to see why the Mary Berry Chocolate Courgette Cake Recipe continues to be a favorite among home bakers. Once you make it, there’s a good chance it’ll become part of your regular baking rotation too.