Desserts
This Carbone Chocolate Hazelnut Cake brings the iconic Italian gelato brand's signature flavor to your kitchen with layers of rich chocolate and toasted hazelnut goodness. 💛 The secret lies in infusing Nutella into the batter and topping it with a crunchy, caramelized layer that mimics Carbone's signature texture—moist, decadent, and perfectly balanced between sweet and nutty.
The cake features three distinct layers: a velvety chocolate base, Nutella-infused middle that delivers that signature hazelnut-chocolate harmony, and a final layer dusted with powdered sugar for a professional finish.
Each bite combines the smoothness of the cake with the crunch of the toasted hazelnut topping, creating a texture that's impossible to resist.
What sets this recipe apart is the foolproof technique for achieving a perfectly moist crumb without drying out, even when baked at the ideal temperature. The Nutella infusion happens through a simple yet effective method that ensures every slice delivers that authentic Carbone flavor you know and love.
Serve it at room temperature for the best texture, or chill slightly for a more gelato-like experience. Perfect for celebrations, dessert nights, or when you simply need a taste of Italy in your kitchen. Let's get baking!
Ingredients for carbone chocolate hazelnut cake
Rich chocolate, velvety Nutella layers, and crunchy hazelnut topping—just eight ingredients transform into Carbone's iconic flavor.
| Ingredient | Amount | Notes |
|---|---|---|
| Unsalted Butter 🧈 | 1 ½ cups | Room temperature for creaming |
| Granulated Sugar 🍚 | 2 ½ cups | Superfine preferred for smoothness |
| Dark Chocolate Chips 🍫 | 1 ½ cups | 70% cocoa or higher |
| Large Eggs 🥚 | 6 whole | Room temperature, separated |
| All-Purpose Flour 🌾 | 2 cups | Sifted, spooned and leveled |
| Baking Powder 🍃 | 1 tbsp | Aluminum-free preferred |
| Cocoa Powder 🍫 | ½ cup | Dutch-processed for richness |
| Vanilla Extract 🌿 | 2 tsp | Pure Madagascar preferred |
| Salt 🧂 | ½ tsp | Fine sea salt |
| Nutella 🥜 | 1 ½ cups | Original hazelnut spread |
| Toasted Hazelnuts 🌰 | 2 cups | Chopped, skin removed |
| Powdered Sugar 🍚 | 1 cup | For dusting final layer |
| Heavy Cream 🥛 | ½ cup | Cold for caramelizing |
| Corn Syrup 🍯 | 1 tbsp | For caramelized topping |
The Nutella is non-negotiable here—original hazelnut spread only, no shortcuts. Trader Joe's or Costco carry the best quality jars. For the chocolate, Valrhona or Callebaut chips elevate this beyond basic baking, but Ghirardelli works perfectly fine for home bakers. Toast your own hazelnuts for maximum flavor: spread them on a baking sheet at 350°F for 10 minutes, then rub off the skins with a kitchen towel. That extra effort makes all the difference in the crunchy topping. The cocoa powder should be Dutch-processed—it dissolves more smoothly and adds depth to the flavor.
No Nutella? Homemade hazelnut-chocolate spread works (mix melted chocolate with toasted hazelnut butter), but it won't be identical. Running short on dark chocolate chips? Chop a 6-oz bar instead—just melt it first for even distribution. For the caramelized topping, light corn syrup is key—it prevents crystallization. Substituting maple syrup will give a different texture, but still delicious. The hazelnuts can be store-bought if you're in a rush, but freshly toasted and skinned nuts bring that authentic Carbone crunch. And if you're wondering about vanilla: imitation extracts won't cut it here—splurge on the good stuff.
Store the cake in an airtight container at room temperature for up to 4 days, or refrigerate for 7 days if you're prepping ahead. The topping stays crisp for 3 days if kept dry—cover it loosely with parchment paper. For maximum freshness, bake the layers separately and assemble just before serving. The flavors meld beautifully overnight, but the texture suffers if the topping sits too long. Freeze the fully assembled cake for up to 3 months—thaw at room temperature before serving. And trust me, leftovers disappear fast
Why You'll Love This Recipe
- No Mixer Needed: I swear by this—just cream the butter and sugar until it’s light, then fold in the eggs and flour. That’s it. The dark chocolate chips melt into pockets of gooey perfection without a single whisk stroke.
- Rich Without the Effort: Between us, this cake tastes like it took hours, but it’s really just a bowl of butter, sugar, and melted chocolate. The hazelnut undertones sneak in quietly, making every slice feel like a little indulgence.
- Weeknight or Celebration: Honestly, I’ve served this at birthday dinners and lazy Sunday brunches—no one ever questions why. The texture holds up for days, and the flavor only gets better as it sits.
- Budget-Friendly Luxury: Four ingredients, one bowl, zero waste. The butter and eggs make it feel special, but the flour and sugar keep it affordable. Plus, the leftovers? They disappear faster than I can say “second helping.”
Step-by-step instructions for Carbone chocolate hazelnut cake
Here's how to create decadent Nutella-infused layers with a crunchy, caramelized topping that'll impress everyone.
🍳 Step 1: Cream Butter and Sweeteners to Light and Fluffy
In a stand mixer fitted with the paddle attachment, beat the 1.5 cups unsalted butter and 2.5 cups granulated sugar on medium speed for 3-4 minutes until light and fluffy. You'll see the mixture nearly double in volume and become pale in color—this is crucial for a tender cake. I like to scrape down the sides every minute to ensure even mixing.
This creaming process incorporates air, which creates that signature light texture. If your butter isn't quite room temperature (it should leave a slight indent when pressed), let it sit at room temperature for another 10 minutes before proceeding. The reason we wait is that cold butter won't cream properly, leading to dense cake layers.
👨🍳 Step 2: Incorporate Eggs and Nutella for Richness
Add the 6 whole large eggs one at a time, mixing on low speed for 30 seconds after each addition until fully incorporated. Then add the 2 teaspoons vanilla extract and mix for another 10 seconds. Here's the thing—don't overmix at this stage. We want to maintain as much air as possible for that perfect rise.
Next, reduce the speed to low and gradually add the 1.5 cups Nutella, mixing just until combined. I use a silicone spatula to fold in the Nutella by hand at this point to prevent any potential curdling from the heat of the mixer. The Nutella should be evenly distributed throughout the batter—this is where the magic happens for that signature flavor.
🥘 Step 3: Combine Dry Ingredients and Fold Gently
In a separate bowl, whisk together the 2 cups all-purpose flour, 1 tablespoon baking powder, 0.5 cup cocoa powder, and 0.5 teaspoon salt. Sift these ingredients together first to aerate them, which helps create a lighter texture. Then, gradually add this dry mixture to the wet ingredients, mixing on low speed just until combined—you should still see some flour streaks.
Finally, fold in the 1.5 cups dark chocolate chips and 2 cups toasted hazelnuts by hand using a spatula. Be gentle here to avoid deflating the batter. The chocolate chips and hazelnuts will give you those beautiful pockets of flavor in every bite. Don't skip this step—it makes all the difference in the texture and taste of the final cake.
🔥 Step 4: Bake Layers to Perfect Doneness
Preheat your oven to 350°F and grease three 8-inch round cake pans with butter or use parchment paper liners. Divide the batter evenly among the pans (you should have about 1⅓ cups per pan). Bake for 25-30 minutes or until a toothpick inserted into the center comes out clean. I prefer to check at the 25-minute mark—your oven might run hot, so start checking early.
Let the cakes cool in their pans for 10 minutes, then transfer to a wire rack to cool completely. This cooling step is crucial—it prevents the layers from becoming soggy when you assemble the cake. While they cool, make your caramelized topping by combining the 0.5 cup heavy cream, 1 tablespoon corn syrup, and 1 cup powdered sugar in a saucepan over medium heat. Simmer for 5-7 minutes until slightly thickened, then set aside to cool.
🍽️ Step 5: Assemble and Top with Crunchy Caramel
Once the layers are completely cool, level the tops if needed. Place the first layer on a cake stand or plate and spread a generous layer of the caramelized topping. Here's where it gets fun—add the second layer, then another layer of caramelized topping, and finally the third layer. The caramel should be thick enough to hold the layers together but not so thick that it makes the cake soggy.
Spread the remaining caramelized topping over the entire cake, then dust generously with the 1 cup powdered sugar for that signature crunchy topping. Let the cake set in the refrigerator for at least 1 hour before slicing—this allows the flavors to meld and the topping to harden slightly. Serve chilled for the best texture and experience.
Pro Tips For Making Carbone Chocolate Hazelnut Cake
- Melt Butter Slowly: I learned this the hard way—dumping cold butter straight into hot sugar makes it seize up like a stubborn mule. Instead, cut the butter into small cubes and let it melt gradually into the sugar over low heat, stirring constantly. You’re aiming for a smooth, glossy paste, not a lumpy mess that’ll ruin your cake’s texture.
- Toast the Hazelnuts: Skip the store-bought Nutella spread—freshly toasted hazelnuts make all the difference. Spread them on a baking sheet, toast at 350°F (175°C) for 8–10 minutes until fragrant, then rub them between a clean kitchen towel to remove the skins. Your cake’s flavor will be richer, and the texture won’t turn gritty.
- Don’t Overmix the Batter: I used to beat this batter like I was punishing it. Too much mixing develops the gluten in the flour, and suddenly your cake turns dense instead of light. Mix just until the flour disappears—about 20 seconds—then stop. Overworking it guarantees a sad, heavy result.
- Use Room-Temp Eggs: Cold eggs drop like rocks in warm batter, causing sinkholes and uneven texture. Take your eggs out of the fridge 30 minutes before mixing—yes, even if you’re impatient like me. Warm eggs blend smoothly, giving you that silky, professional crumb you’re after.
Creative variations of this dish
Nutella Swirl Variations
For a marbled effect, divide the batter in half after mixing the Nutella. Spread one portion in your pans, then swirl in dollops of the Nutella-infused batter using a knife.
This creates stunning visual contrast while keeping that signature flavor in every bite. 💛 I like to use a 2-inch offset spatula for clean, even swirls that look like professional bakeries.
Hazelnut-Only Version
Skip the Nutella entirely and replace it with 1.5 cups homemade hazelnut butter (blend toasted hazelnuts until smooth). This version delivers pure hazelnut flavor with a nutty depth that's equally delicious. For extra richness, add 2 tablespoons melted dark chocolate to the butter mixture before incorporating it into the batter.
Espresso Boost
Add 1 tablespoon instant espresso powder to the dry ingredients for a sophisticated coffee-chocolate-hazelnut twist. This works especially well if you're serving the cake with a hot beverage—it enhances the chocolate flavor while adding complexity. I've found that Starbucks Via instant espresso works perfectly for this recipe.
White Chocolate Twist
Replace half the dark chocolate chips with white chocolate chips (about 0.75 cups) for a sweeter, creamier variation. This creates beautiful color contrast in each slice while keeping the hazelnut flavor dominant.
The white chocolate melts more smoothly, giving you a velvety texture that pairs beautifully with the crunchy topping.
Almond Alternative
Swap the hazelnuts for 2 cups toasted almonds (skin removed) to create a nutty variation with a different flavor profile. The almonds add a slightly sweeter, buttery note that complements the chocolate beautifully. For extra crunch, toast the almonds with 1 teaspoon cinnamon before adding them to the batter.
Seasonal Citrus
Add 1 teaspoon orange zest to the batter for a bright, seasonal twist that cuts through the richness. This works especially well during winter holidays when you want to add a festive touch.
I recommend using Valencia orange zest for its sweet, aromatic flavor that pairs perfectly with chocolate and hazelnuts.
Nutrition facts
Frequently asked questions
Can I make this cake without Nutella?
Yes, but the flavor will differ significantly. For a Nutella-free version, blend 1.5 cups toasted hazelnuts into a smooth butter and mix with 2 tablespoons melted dark chocolate to replicate the spread's richness. The cake will still be delicious but won't have that signature Carbone harmony.
Why does the cake need to cool completely before assembling?
Assembling warm layers causes the caramelized topping to melt and makes the cake soggy. Letting each layer cool completely ensures clean slices and maintains the crunchy powdered sugar topping. If you're short on time, chill the layers in the fridge for 20 minutes before assembling.
How do I store leftovers to keep the topping crisp?
Store the cake in an airtight container at room temperature for up to 4 days, but cover the topping with parchment paper to prevent moisture. For longer storage, refrigerate for 7 days. To refresh the crunch, sprinkle extra powdered sugar on the topping before serving.
Can I use a different nut instead of hazelnuts?
Try toasted almonds or pecans for a different flavor profile. For almonds, toast with 1 teaspoon cinnamon first. Pecans add a buttery richness, but hazelnuts provide that authentic Carbone crunch. The topping texture will vary slightly depending on the nut.
Why did my cake turn out dense?
Overmixing the batter or using cold butter are common culprits. Ensure your butter is room temperature and mix just until combined after adding dry ingredients. Also, don't overfill the pans—1⅓ cups per 8-inch pan is ideal. For extra moisture, add 1 tablespoon sour cream to the batter.