Decadent Chocolate Hazelnut Mousse Cake – A Rich and Creamy Delight

There’s something truly special about the combination of rich chocolate and nutty hazelnuts. This Decadent Chocolate Hazelnut Mousse Cake brings together a fudgy brownie base, a light and airy chocolate-hazelnut mousse, and a silky chocolate glaze. Whether for a special celebration or an indulgent weekend treat, this cake will leave everyone craving more.

Why You’ll Love This Cake

• Layers of Texture – A chewy brownie base, creamy mousse, and a glossy chocolate glaze.
• Irresistible Flavor – A perfect balance of deep chocolate and toasted hazelnut.
• Showstopper Dessert – Elegant and impressive yet easy to make.
• Make-Ahead Friendly – Ideal for preparing in advance.

Ingredients You’ll Need

For the Brownie Base:

• 1 cup (6 oz) semi-sweet chocolate chips
• 1/2 cup (1 stick) unsalted butter
• 3/4 cup granulated sugar
• 2 large eggs
• 1 teaspoon vanilla extract
• 1/2 cup all-purpose flour
• 1/4 teaspoon salt
• 1/2 cup chopped toasted hazelnuts

For the Chocolate Hazelnut Mousse:

• 1 cup heavy whipping cream
• 1/2 cup chocolate-hazelnut spread (like Nutella)
• 1 teaspoon unflavored gelatin
• 2 tablespoons cold water

For the Chocolate Glaze:

• 1/2 cup milk chocolate chips
• 1/4 cup heavy cream

Step-by-Step Directions

1. Prepare the Brownie Base

Preheat your oven to 350°F. Grease an 8-inch round baking pan and line it with parchment paper.

In a microwave-safe bowl, melt the chocolate chips and butter in 30-second intervals, stirring until smooth. Whisk in the sugar, then add the eggs one at a time, mixing well. Stir in the vanilla extract.

Gently fold in the flour and salt, followed by the chopped toasted hazelnuts. Pour the batter into the prepared pan and bake for 20–25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Let it cool completely.

2. Make the Chocolate Hazelnut Mousse

Sprinkle the gelatin over cold water in a small bowl and let it sit for 5 minutes.

In a separate bowl, microwave the chocolate-hazelnut spread until it becomes pourable.

Microwave the gelatin mixture for 10 seconds until fully liquid, then stir it into the chocolate-hazelnut spread.

In a large bowl, whip the heavy cream to stiff peaks. Gently fold it into the chocolate mixture until smooth and well combined.

3. Assemble the Cake

Spread the chocolate hazelnut mousse evenly over the cooled brownie base. Refrigerate for at least 2 hours, or until set.

4. Prepare the Chocolate Glaze

In a microwave-safe bowl, melt the milk chocolate chips and heavy cream in 20-second intervals, stirring until smooth.

Let the glaze cool slightly until thick yet pourable.

5. Glaze & Serve

Pour the glaze over the cake and spread it evenly. Refrigerate for 30 minutes to allow the glaze to set.

Slice and serve chilled. Enjoy!

Pro Tips for a Perfect Mousse Cake

• Use High-Quality Chocolate – The richer the chocolate, the better the flavor.
• Chill Between Layers – Ensures each layer sets properly before adding the next.
• Fold Gently – Keeps the mousse airy and light.
• Use a Hot Knife to Slice – Helps achieve clean, professional-looking slices.

Storage and Make-Ahead Instructions

• Refrigerator – Store in an airtight container for up to 5 days.
• Freezer – Freeze slices for up to 2 months. Thaw in the fridge before serving.

Frequently Asked Questions (FAQs)

1. Can I make this cake without hazelnuts?

Yes! You can replace hazelnuts with almonds, pecans, or leave them out entirely for a nut-free version.

2. Can I use dark chocolate instead of semi-sweet?

Absolutely! Dark chocolate will give the cake a deeper, more intense flavor.

3. How do I prevent the mousse from becoming too dense?

Gently fold the whipped cream into the chocolate mixture—avoid overmixing.

4. Can I make this cake ahead of time?

Yes! It’s best when made a day ahead, as chilling enhances the flavors and texture.

5. What’s the best way to cut clean slices?

Use a hot knife, wiping it clean between each cut for neat slices.

Conclusion

This Decadent Chocolate Hazelnut Mousse Cake is the perfect balance of rich chocolate, nutty hazelnut, and silky mousse. With its fudgy brownie base, creamy mousse layer, and glossy chocolate glaze, it’s a showstopping dessert that’s easier to make than it looks. Whether you’re celebrating a special occasion or just indulging in a chocolate craving, this cake is guaranteed to impress. Try it today and experience pure chocolate bliss!

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