Desserts
This Carbone chocolate hazelnut cake delivers restaurant-quality layers of rich cocoa and toasted hazelnut perfection in every bite. The secret lies in a velvety chocolate cake base infused with hazelnut extract, separated by rivers of Nutella ganache that create a decadent, triple-layered experience.
I've perfected this recipe over years of baking competitions, ensuring each slice offers the perfect balance of moist cake and nutty crunch.
The cake itself bakes up with a tender crumb and subtle hazelnut aroma, while the Nutella ganache between layers adds that signature Carbone-style indulgence. What sets this apart is the toasted hazelnut crumble topping—crispy yet tender—that adds texture contrast and enhances the chocolate flavor profile.
Baking at 350°F for 25-30 minutes ensures even layers without drying out the cake.
By the time you're done assembling, you'll have a showstopper dessert with golden-brown layers, glossy ganache rivers, and a crunchy nut topping that makes it impossible to eat just one slice. The combination of warm spices and rich chocolate creates a flavor experience that rivals any high-end patisserie.
This cake is perfect for special occasions or when you want to impress with a dessert that looks as good as it tastes.
Optional plating suggestions include dusting with powdered sugar for an elegant finish or garnishing with fresh hazelnuts for extra visual appeal. The recipe scales beautifully for gatherings, while individual portions make it ideal for date nights or celebrations. Let's create this showstopping dessert together.
Ingredients for carbone chocolate hazelnut cake
These carefully selected ingredients create a decadent triple-layered cake with Nutella rivers and hazelnut crunch.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 3 cups | Sifted for light texture |
| Unsalted Butter 🧈 | 2 cups | Cold, cubed for cake layers |
| Granulated Sugar 🍚 | 2 ½ cups | Superfine preferred for smooth batter |
| Dark Chocolate Chips 🍫 | 1 ½ cups | 70% cocoa content minimum |
| Hazelnut Extract 🌰 | 1 tbsp | Pure, not imitation |
| Large Eggs 🥚 | 4 whole | Room temperature for even mixing |
| Whole Milk 🥛 | 1 cup | Room temperature preferred |
| Vanilla Extract 🌸 | 2 tsp | Pure Madagascar preferred |
| Baking Powder 🧂 | 1 ½ tsp | Aluminum-free for stability |
| Salt 🧂 | ½ tsp | Fine sea salt preferred |
| Nutella 🍫 | 2 cups | Original hazelnut spread |
| Toasted Hazelnuts 🌰 | 2 cups | Chopped, skin-on preferred |
| Powdered Sugar 🍚 | 1 cup | For dusting final layers |
| Unsalted Butter 🧈 | ¼ cup | Melted for crumble topping |
| Brown Sugar 🍚 | ¼ cup | Packed for crumble texture |
The chocolate chips and hazelnut extract are non-negotiable for that signature Carbone flavor. Ghirardelli 70% dark chocolate melts beautifully, while LorAnn Oils hazelnut extract delivers authentic depth. For the hazelnuts, Whole Foods bulk section has the best quality—look for skins still attached for extra crunch. The Nutella should be the original version, not the lighter spreads. If you can't find it, Ferrero Rocher chocolate hazelnut spread is a close second. For the cake layers, King Arthur flour bakes up lighter than store brands.
No hazelnut extract? 1 tsp almond extract plus 1 tsp vanilla gets you close, though it won't be identical. Substituting dark chocolate? 72% cocoa or higher maintains that rich bitterness. Running low on Nutella? Melt equal parts dark chocolate and hazelnut butter as a substitute. The crumble topping can use pecans or walnuts if hazelnuts are unavailable, though texture will differ. For the butter, European-style has higher fat content—ideal for this recipe. If you're baking ahead, make the crumble fresh the day of serving for maximum crunch.
The cake layers keep 3 days at room temperature covered, while the crumble stays crisp for 2 days if stored separately. Assemble the cake 4 hours before serving to let flavors meld. For make-ahead baking, freeze fully assembled layers (unfrosted) for up to 2 months. Thaw overnight at room temperature. The Nutella ganache hardens slightly when chilled—bring to room temperature 30 minutes before serving for those perfect rivers. Store any leftovers in an airtight container in the fridge for 5 days, though I doubt it'll last that long.
Why You'll Love This Recipe
- No Mixer Needed: I swear by this recipe when I’m too tired to pull out the stand mixer—just cream butter and sugar by hand until it’s light and fluffy. The hazelnut extract does all the heavy lifting for flavor, so you’re not stuck measuring nutmeg or grinding whole hazelnuts.
- Rich Without Effort: That first bite? It’s like Nutella and fudge had a baby, but better—thanks to the dark chocolate chips melting into pockets of gooey perfection. Honestly, the hazelnut extract makes the whole thing taste luxurious without needing actual hazelnuts (or the mess).
- Weeknight or Celebration: Between us, this cake is my go-to for birthdays and lazy Sundays. The texture holds up for days, so you can bake it ahead and still have slices that taste fresh. (Yes, even on a Tuesday night.)
- Budget-Friendly Luxury: You’re using pantry staples—flour, butter, sugar—and a little extract to make something that tastes like a bakery treat. I’ve made this for 12 people for under $15, and no one ever guesses it’s not homemade from scratch.
Step-by-step instructions for triple-layered chocolate hazelnut cake
Here's how to create a decadent triple-layered cake with rich chocolate and nutty depth.
Prepare the Cake Layers
Preheat your oven to 350°F and grease three 8-inch round cake pans, lining the bottoms with parchment paper. In a large mixing bowl, combine the 3 cups all-purpose flour, 1.5 teaspoons baking powder, and 0.5 teaspoon salt. Sift the mixture to ensure a light, airy texture—this prevents dense layers. Set aside.
In a separate large bowl, cream together the 2 cups unsalted butter and 2.5 cups granulated sugar on medium speed until light and fluffy, about 3-4 minutes. The mixture should nearly double in volume and become pale. Add the 4 whole large eggs, one at a time, mixing well after each addition. This step is critical for achieving a tender crumb.
In a small bowl, whisk together the 1 cup whole milk, 1 tablespoon hazelnut extract, and 2 teaspoons vanilla extract. Gradually add this mixture to the butter-sugar mixture, alternating with the dry ingredients. Begin and end with the dry ingredients to ensure even distribution. Mix on low speed until just combined—overmixing develops gluten and can make the cake tough.
Fold in the 1.5 cups dark chocolate chips using a spatula, ensuring they're evenly distributed throughout the batter. Divide the batter evenly among the prepared cake pans, smoothing the tops with a spatula. Bake for 25-30 minutes or until a toothpick inserted into the center comes out clean. Allow the layers to cool in the pans for 10 minutes before transferring them to a wire rack to cool completely.
Create the Nutella Ganache Filling
While the cake layers cool, prepare the Nutella ganache by melting the 2 cups Nutella in a microwave-safe bowl in 30-second intervals, stirring between each interval until smooth and fully melted. This gentle melting process prevents the Nutella from seizing or becoming grainy.
Remove the melted Nutella from the microwave and let it cool slightly for 2-3 minutes until it reaches a pourable consistency. The ganache should be thick but still able to flow easily—this ensures it spreads evenly between the cake layers. If it cools too much, warm it gently over a double boiler or in short microwave bursts.
Once the cake layers are completely cool, place one layer on a serving plate. Spread a generous layer of the Nutella ganache over the top, leaving a ½-inch border around the edges. This border prevents the ganache from oozing out during assembly. Repeat with the remaining two layers, creating a triple-layered cake with ganache rivers between each layer.
Assemble and Decorate the Cake
Prepare the crumble topping by combining the 2 cups toasted hazelnuts, 0.25 cup melted unsalted butter, 0.25 cup packed brown sugar, and a pinch of salt in a food processor. Pulse until the mixture resembles coarse crumbs with some larger pieces remaining for texture. Spread this crumble evenly over the top and sides of the cake, pressing gently to adhere.
Dust the cake generously with 1 cup powdered sugar using a fine-mesh sieve to create an even, snowy finish. The powdered sugar adds a delicate sweetness and enhances the visual appeal of the cake. For extra flair, you can drizzle any remaining Nutella over the top in artistic swirls or add additional chopped toasted hazelnuts for crunch.
Let the cake rest in the refrigerator for at least 1 hour before serving. This chilling time allows the ganache to set slightly, making it easier to slice and serve. Each slice will reveal rivers of Nutella, layers of moist cake, and a crunchy hazelnut topping—perfect for any chocolate lover.
Pro Tips For Making Carbone Chocolate Hazelnut Cake
- Melt Butter Slowly: I learned this the hard way—dumping cold butter into hot sugar makes a greasy mess. Instead, cut the butter into small cubes and let it melt gradually into the sugar over low heat. You want a smooth, shiny ribbon stage, not a buttery sludge.
- Toast Hazelnuts First: Skip store-bought hazelnut spread—it’s watered down. Toast whole hazelnuts in a dry pan for 8–10 minutes until fragrant, then rub them in a towel to remove skins. This adds real depth to the extract’s flavor and avoids that artificial aftertaste.
- Don’t Overmix Batter: The second you see streaks of flour in the batter, stop stirring. Overworking it makes the cake dense and tough. Use a spatula to gently fold in chocolate chips and nuts—just until combined. Your future self will thank you for the tender crumb.
- Test for Doneness Early: This cake’s dense, so the toothpick trick fails. Instead, press the center lightly with a finger—it should spring back slowly, not bounce. If it’s still jiggly, tent with foil and bake another 5–10 minutes. No, the recipe’s time isn’t gospel.
Essential equipment for great carbone chocolate hazelnut cake
Must-Have Baking Tools
First, invest in a 9-inch springform pan for baking the cake layers—it gives you clean sides for perfect slices. I use Wilton Perfect Results pans because they release easily without sticking.
A high-quality digital scale (like the OXO Good Grips) ensures precise measurements for the batter, especially when weighing the flour and chocolate chips. 🔥
Mixing Essentials
For the cake batter, a stand mixer with a paddle attachment (such as the KitchenAid Artisan Series) is a game-changer. It creams the butter and sugar to perfection and handles the eggs and milk smoothly.
If you don’t have a mixer, a hand mixer (like the Black+Decker BM450) works well for smaller batches. For folding in the chocolate chips, a spatula with a flexible edge helps distribute them evenly without overmixing.
Ganache & Assembly Tools
Melting the Nutella requires a microwave-safe bowl (I prefer Pyrex) and a spatula for stirring. To spread the ganache evenly, use an offset spatula—it gives you smooth, professional-looking layers.
For the crumble topping, a food processor (like the Cuisinart DFP-14BCY) is ideal, but a mortar and pestle works in a pinch. A fine-mesh sieve (such as the Norpro Stainless Steel) ensures a flawless powdered sugar dusting.
Decorating & Serving
For artistic drizzles, a piping bag with a small round tip (like the Ateco 807) lets you create elegant Nutella swirls. A sharp serrated knife (such as the Mercer Culinary Genesis) makes clean cuts through the cake layers.
To keep everything organized, use parchment-lined cake boards (like Wilton Cake Stands) for assembly and serving. These tools make plating effortless and professional-looking.
Optional Pro Upgrades
If you’re serious about baking, a thermometer (like the Thermoworks Thermapen) helps monitor the oven temperature for even baking. For toasted hazelnuts, a skillet or dry pan works, but a toaster oven (like the Breville TO32BSS) gives you more control over the toast level.
A bench scraper (such as the OXO Good Grips) ensures precise measurements when dividing the batter into pans. These extras take your cake to the next level. ✨
Nutrition facts
Frequently asked questions
Can I substitute hazelnut extract if I can't find it?
Yes! Mix 1 teaspoon almond extract with 1 teaspoon vanilla extract for a close flavor profile. The cake will still taste delicious, though it won't have that authentic hazelnut depth. For best results, toast extra hazelnuts and fold them into the batter for added nutty flavor.
Why does my cake turn out dense instead of light and fluffy?
Overmixing the batter is the #1 cause of dense cake. Mix just until combined after adding the dry ingredients. Also ensure your butter and eggs are at room temperature, and don't overfill the pans—fill them only ⅔ full. Using cake flour instead of all-purpose can also improve texture.
How do I prevent the Nutella ganache from oozing out?
Leave a ½-inch border around each cake layer when spreading the ganache. Chill the assembled cake for 1 hour before serving to help the ganache set. For extra stability, spread the crumble topping on the sides first, then the top. If it still oozes, the Nutella was too warm—cool it slightly before using.
Can I make this cake ahead of time?
Bake the cake layers 1 day ahead and store wrapped at room temperature. Assemble the cake 4 hours before serving to let flavors meld. For longer storage, freeze the fully assembled (unfrosted) cake for up to 2 months. Thaw overnight in the fridge before serving. The crumble topping stays crispest when added fresh.
What's the best way to toast hazelnuts for the crumble?
Spread hazelnuts in a single layer on a baking sheet and toast at 350°F for 8-10 minutes, stirring halfway. They're done when golden and fragrant. For extra crunch, pulse them briefly in a food processor after toasting. Keep skins on for maximum texture—just remove any loose skins before using.