Crispy Chocolate Cake With Hazelnut & Sour Cream

This Crispy Chocolate Cake with Hazelnut & Sour Cream is the perfect dessert for chocolate lovers who enjoy rich flavor with an elegant texture. The outside bakes into a crisp, crackly shell while the inside stays soft, airy, and deeply fudgy. Finished with a creamy Nutella-swirled sour cream topping, this gluten-free cake feels both rustic and luxurious, making it ideal for dinner parties, holidays, or anytime you crave an unforgettable chocolate dessert.

Why You’ll Love This Recipe

• Rich chocolate flavor balanced with nutty hazelnut notes
• Naturally gluten-free without sacrificing texture
• Crisp exterior with a soft, mousse-like center
• Easy to prepare with simple ingredients
• Perfect make-ahead dessert for gatherings
• Beautiful cracked top gives it a bakery-style appearance
• Nutella whipped topping adds extra creaminess and flavor
• Works well for birthdays, celebrations, or casual desserts

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the cake:

• ½ cup unsalted butter, plus extra for greasing
• ¾ cup plus 2 tablespoons granulated sugar
• 8 ounces bittersweet chocolate, finely chopped
• ½ cup Nutella or hazelnut spread
• 6 large eggs
• ½ cup hazelnut flour or almond flour
• 2 tablespoons unsweetened cocoa powder
• 1 teaspoon kosher salt

For the topping:

• 1 cup heavy cream
• ¼ cup confectioners’ sugar
• Pinch of kosher salt
• 1 cup sour cream
• ¼ cup Nutella
• Maraschino cherries for serving (optional)

Directions

1. Preheat your oven to 350°F (175°C). Grease a 9-inch springform pan with butter or nonstick spray. Sprinkle a little sugar inside the pan and rotate it to coat evenly.
2. In a large heatproof bowl, combine the chopped bittersweet chocolate, Nutella, and butter. Place the bowl over simmering water and stir until smooth and fully melted. Remove from heat and allow it to cool slightly.
3. Separate 4 eggs, placing the whites in a large mixing bowl and the yolks in another bowl. Add the remaining 2 whole eggs to the yolks along with the hazelnut flour, cocoa powder, and salt. Whisk until smooth.
4. Gently fold the egg yolk mixture into the melted chocolate mixture using a spatula. The batter will be thick and glossy.
5. Using an electric mixer, beat the egg whites on high speed. Slowly add ¾ cup sugar, one spoonful at a time, until stiff peaks form and the mixture becomes fluffy and glossy.
6. Carefully fold the whipped egg whites into the chocolate batter in batches. Mix gently until no white streaks remain while keeping as much air in the batter as possible.
7. Pour the batter into the prepared pan and smooth the surface. Sprinkle the remaining 2 tablespoons sugar over the top.
8. Bake for 35–40 minutes until the cake is puffed, lightly cracked, and slightly jiggly in the center.
9. Allow the cake to cool completely. The center will naturally sink and crack more as it cools, creating its signature crispy edges and soft middle.
10. To make the topping, whip the heavy cream, confectioners’ sugar, and salt until medium-stiff peaks form. Fold in the sour cream, then gently swirl in the Nutella for a marbled effect.
11. Serve slices of cake with the topping on the side or spooned lightly over the top. Garnish with cherries if desired.

Servings and timing

• Servings: 8–10 slices
• Prep Time: 25 minutes
• Cook Time: 40 minutes
• Cooling Time: 1 hour
• Total Time: About 2 hours 5 minutes

Variations

• Replace Nutella with almond butter for a less sweet version.
• Add espresso powder to intensify the chocolate flavor.
• Use dark chocolate with 70% cacao for a deeper richness.
• Top with toasted hazelnuts for extra crunch.
• Serve with fresh raspberries or strawberries for brightness.
• Add a splash of vanilla extract to the whipped topping.
• Use tahini instead of Nutella for a sophisticated sesame flavor.

Storage/Reheating

Store the cake tightly wrapped at room temperature for up to 2 days. For longer storage, refrigerate it for up to 5 days. Keep the whipped topping refrigerated separately in an airtight container.

To freeze, wrap individual slices tightly in plastic wrap and place them in a freezer-safe container for up to 2 months. Thaw overnight in the refrigerator before serving.

This cake is best enjoyed at room temperature. If refrigerated, let it sit out for about 20 minutes before eating to soften the texture slightly.

FAQs

Why does the center of the cake collapse?

The center naturally sinks as the cake cools. This creates the signature crispy edges and soft, fudgy middle.

Can I make this cake ahead of time?

Yes, the cake can be baked up to 2 days in advance and stored tightly wrapped at room temperature.

Is this cake gluten-free?

Yes, it contains no wheat flour, making it naturally gluten-free.

Can I use almond flour instead of hazelnut flour?

Absolutely. Almond flour works very well and still creates a delicious texture.

What type of chocolate works best?

Bittersweet chocolate with at least 67% cacao gives the richest flavor and balanced sweetness.

Can I freeze the cake?

Yes, individual slices freeze beautifully for up to 2 months.

Do I need a springform pan?

A springform pan is easiest, but a regular cake pan lined with parchment paper also works.

Can I skip the topping?

Yes, the cake is delicious on its own, though the topping adds a creamy contrast.

Why are the egg whites important?

Whipped egg whites give the cake its light, airy texture while still keeping it rich.

Can I make this without Nutella?

Yes, almond butter or tahini can be used for a different flavor profile with less sweetness.

Conclusion

This Crispy Chocolate Cake With Hazelnut & Sour Cream is the kind of dessert that feels both impressive and comforting. Its crisp exterior, soft chocolate center, and creamy topping create a combination that is rich without feeling heavy. Whether you serve it for a celebration or simply as a weekend treat, this cake delivers bakery-quality flavor with surprisingly simple preparation.

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