Ingredients

Sponge Biscuit

5 eggs
85 grams (3 ounces) sugar
30 grams (1.06 ounces) cocoa powder
26 grams (0.92 ounces) flour
4 grams (0.14 ounces) baking powder
200 grams (7.05 ounces) hazelnuts
We recommend:
For granulated sugar:
Prime best seller Sugar In The Raw Granulated Turbinado Cane Sugar Cubes, No Added Flavors or erythritol, Pure Natural Sweetener, Hot & Cold Drinks, Coffee, Vegan, Gluten-Free, Non-GMO,Pack of 1
4.8
(12,536) Sugar In The Raw Granulated Turbinado Cane Sugar Cubes, No Added Flavors or erythritol, Pure Natural Sweetener, Hot & Cold Drinks, Coffee, Vegan, Gluten-Free, Non-GMO,Pack of 1 $5.27 View details Prime Sugar In The Raw Granulated Turbinado Cane Sugar, No Added Flavors or erythritol, Pure Natural Sweetener, Hot & Cold Drinks, Coffee, Baking, Vegan, Gluten-Free, Non-GMO, Bulk Sugar, 2lb Bag (1-Pack)
4.8
(18,788) Sugar In The Raw Granulated Turbinado Cane Sugar, No Added Flavors or erythritol, Pure Natural Sweetener, Hot & Cold Drinks, Coffee, Baking, Vegan, Gluten-Free, Non-GMO, Bulk Sugar, 2lb Bag (1-Pack) $3.74 $4.14 View details Prime C&H Pure Cane Granulated White Sugar, 25-Pound Bags
4.6
(205) C&H Pure Cane Granulated White Sugar, 25-Pound Bags $56.99 $49.98 View details
For cocoa powder:
Prime Valrhona Cocoa Powder - 3 kg
4.6
(290) Valrhona Cocoa Powder - 3 kg $84.95 View details Prime best seller Viva Naturals Organic Cacao Powder, 2lb - Unsweetened Cocoa Powder With Rich Dark Chocolate Flavor, Perfect for Baking & Smoothies - Certified Vegan, Keto & Paleo, Non-GMO & Gluten-Free, 907 g
4.6
(20,450) Viva Naturals Organic Cacao Powder, 2lb - Unsweetened Cocoa Powder With Rich Dark Chocolate Flavor, Perfect for Baking & Smoothies - Certified Vegan, Keto & Paleo, Non-GMO & Gluten-Free, 907 g $20.49 View details BetterBody Foods Organic Cacao Powder, Rich Chocolate Flavor, Non-GMO, Gluten-Free, Cocoa, 16 ounce, 1 lb bag
4.7
(17,488) BetterBody Foods Organic Cacao Powder, Rich Chocolate Flavor, Non-GMO, Gluten-Free, Cocoa, 16 ounce, 1 lb bag $10.41 View details
For all-purpose flour:
Prime Bob's Red Mill Gluten Free 1-to-1 Baking Flour, 22 Ounce (Pack of 4)
4.8
(9,312) Bob's Red Mill Gluten Free 1-to-1 Baking Flour, 22 Ounce (Pack of 4) $23.96 View details Prime Antimo Caputo Chefs Flour - Italian Double Zero 00 - Soft Wheat for Pizza Dough, Bread, & Pasta, 2.2 Lb (Pack of 2)
4.7
(15,802) Antimo Caputo Chefs Flour - Italian Double Zero 00 - Soft Wheat for Pizza Dough, Bread, & Pasta, 2.2 Lb (Pack of 2) $16.99 View details Prime best seller King Arthur, Measure for Measure Flour, Certified Gluten-Free, Non-GMO Project Verified, Certified Kosher, 3 Pounds, Packaging May Vary
4.7
(20,691) King Arthur, Measure for Measure Flour, Certified Gluten-Free, Non-GMO Project Verified, Certified Kosher, 3 Pounds, Packaging May Vary $8.62 View details
For baking powder:
Prime Clabber Girl Double Acting Baking Powder, 8.1 Ounce
4.8
(10,144) Clabber Girl Double Acting Baking Powder, 8.1 Ounce $2.63 View details Prime 365 by Whole Foods Market, Baking Soda, 16 Ounce
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(8,361) 365 by Whole Foods Market, Baking Powder Aluminum Free, 10 Ounce $3.29 View details
For hazelnuts:
In Shell Hazelnuts (Filberts) - 24/16 oz. Bags
4.7
(7) In Shell Hazelnuts (Filberts) - 24/16 oz. Bags $83.20 View details Prime Presto Sales Filberts Hazelnuts Fresh off the tree Raw In Shell, Oregon, USA, fun to crack - 160 oz. (10 lbs.) Convenient Bag in a Box
4.4
(448) Presto Sales Filberts Hazelnuts Fresh off the tree Raw In Shell, Oregon, USA, fun to crack - 160 oz. (10 lbs.) Convenient Bag in a Box $68.99 View details Alta Langa Hazelnuts - Terra delle Nocciole - Piemonte, Italy
5
(43) Alta Langa Hazelnuts - Terra delle Nocciole - Piemonte, Italy $25.50 View details

Filling

200 grams (7.05 ounces) butter
200 grams (7.05 ounces) chocolate
100 grams (3.53 ounces) Nutella
120 grams (4.23 ounces) crunchy waffles
We recommend:
For unsalted butter:
Prime Kevala Cashew Butter 7 Lbs Pail
4.5
(38) Kevala Cashew Butter 7 Lbs Pail $83.62 View details Prime best seller 4th & Heart Original Grass-Fed Ghee, Clarified Butter, Keto, Pasture Raised, Lactose and Casein Free, Certified Paleo (9 Ounces)
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For dark chocolate bar:
Prime Sunbelt Bakery Chocolate Chip Chewy Granola Bars, 50 - 1.0 OZ Bars (5 Boxes)
4.7
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For Nutella hazelnut spread:
Prime Nutella Hazelnut Spread With Cocoa For Breakfast, 35.3 Oz Jar
4.8
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(5,937) Nutella & GO! Bulk 24 Pack, Hazelnut and Cocoa Spread with Breadsticks, Snack Cups, 1.8 oz Each $29.99 $52.56 View details
For crunchy waffles:
Prime Rip Van Wafels Honey & Oats Stroopwafels - Healthy Snacks - Non GMO Snack - Keto Friendly - Office Snacks - Low Sugar (3g) - Low Calorie Snack - 48 Count (Pack of 1)
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4
(32) Avieta Individually Wrapped Pearl Sugar Waffles, 1.94 Ounce - 52 per case $79.99 View details

Instructions

Step 1

1. Preheat your oven to 160°C (320°F). Wash the hazelnuts, then toast them in the oven for about 10-15 minutes. Transfer the nuts to a food processor and grind them into small pieces, being careful not to crush them into powder. Toasting nuts enhances their flavor; monitor closely to prevent burning.

Step 2

2. Combine the eggs and sugar together and whip until the mixture becomes frothy and light. Sift in the dry ingredients and fold them into the mixture with a silicone spatula, maintaining as much airiness as possible. Add the chopped nuts and mix everything together gently. Folding helps retain air and makes the sponge lighter.

Step 3

3. Divide the cake mixture evenly between two 18 cm (7.10 inch) baking pans. Bake at 180°C (356°F) for about 30 minutes. Use a toothpick to check for doneness; it should come out clean. Allow the cakes to cool completely before slicing each one into 2 layers using a cake leveler. Cooling the cakes prevents them from crumbling when cut.

Step 4

4. To make the filling, melt the chocolate in the microwave or over a hot water bath, then let it cool to room temperature. Whip the softened butter until it becomes fluffy and light in color. Gradually pour in the melted chocolate, one spoonful at a time, while continuing to whip. Then add the room-temperature Nutella. Chop the waffles into small pieces and fold them into the filling mixture with a spatula. Adding chocolate gradually prevents the butter from melting too quickly.

Step 5

5. Assemble the cake by layering it as follows: sponge cake layer, 1/3 filling, sponge cake layer, 1/3 filling, sponge cake layer, 1/3 filling, sponge cake layer. Use a turntable for easier cake assembly and even layers.

Step 6

Optional: Decorate with chocolate ganache (1:1 ratio of chocolate and whipped cream) or a chocolate gourmet glaze. To make the glaze, melt 100 grams (3.55 ounces) of chocolate, then mix in 33 grams (1.20 ounces) of vegetable oil and 33 grams (1.20 ounces) of chopped nuts. Let the mixture cool before glazing your cake. Refrigerating the cake before glazing makes the process smoother.

Servings

Looking to serve this marvelous cake and make it the star of your event? Here are a few quirky and delightful suggestions. Imagine a cozy afternoon tea with this cake as the centerpiece. Pair it with a selection of fine teas like Earl Grey or Darjeeling. The rich, nutty flavors of the cake beautifully complement the subtle undertones of a well-brewed tea. Hosting a kids’ birthday party? Scatter some colorful sprinkles or edible glitter on top of the cake to make it extra festive. You could even serve it with a scoop of vanilla ice cream on the side - because who can resist that? For the grown-ups, why not serve a slice of this hazelnut sponge cake with a dollop of freshly whipped cream and a couple of fresh raspberries on top? Paired with a flute of bubbly Prosecco, it’s an elegant touch that will leave your guests feeling posh and pampered. Feel like indulging a bit more? A drizzle of warm caramel sauce over each slice before serving can elevate the dessert to another level of decadence. Trust me; you’ll be legit tempted to eat it all in one sitting!

Equipment

Food Processor

Essential for grinding the toasted hazelnuts to the right texture. Make sure not to over-process to avoid turning the nuts into butter.

We recommend:
Prime Vitamix Immersion Blender, Stainless Steel, 18 inches
4.7
(4,477) Vitamix Immersion Blender, Stainless Steel, 18 inches $169.95 View details
Mixing Bowls

Use different sizes to separate wet and dry ingredients. Stainless steel or glass bowls work best for maintaining the temperature.

We recommend:
Prime Umite Chef Mixing Bowls with Airtight Lids, 6 piece Stainless Steel Metal Nesting Storage Bowls, Non-Slip Bottoms Size 7, 3.5, 2.5, 2.0,1.5, 1QT, Great for Mixing & Serving (Khaki)
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(27,811) Umite Chef Mixing Bowls with Airtight Lids, 6 piece Stainless Steel Metal Nesting Storage Bowls, Non-Slip Bottoms Size 7, 3.5, 2.5, 2.0,1.5, 1QT, Great for Mixing & Serving (Khaki) $32.28 $37.99 View details
Electric Mixer

Hand or stand mixers are perfect for whipping the eggs and sugar to the desired frothy consistency.

We recommend:
Prime best seller KitchenAid Classic Series 4.5 Quart Tilt-Head Stand Mixer K45SS, Onyx Black
4.8
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Silicone Spatula

Great for folding in ingredients gently to maintain airiness. Cleans easily and is heat-resistant.

We recommend:
Prime Unicook 2 Pack Flexible Silicone Spatula, Turner, 600F Heat Resistant, Ideal for Flipping Eggs, Burgers, Crepes and More, Black
4.6
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(7,228) DI ORO Silicone Spatula - 600°F Heat-Resistant Rubber Kitchen Spatula for Baking, Scraping, & Mixing - BPA Free Nonstick Cookware Safe Flexible Utensil for Cooking - Seamless & Dishwasher Safe (Black) $13.97 $17.97 View details
18cm (7.10 inch) Baking Pans

Ensure the batter is evenly spread in these pans for uniform layers. Lining them with parchment paper can help prevent sticking.

We recommend:
Prime HIWARE 8-Inch Round Cake Pan Set of 3, Nonstick Baking Cake Pans with 90 Pieces Parchment Paper, Dishwasher Safe
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Microwave or Double Boiler

Needed for melting chocolate without burning it. The double boiler method gives you more control over the heat.

We recommend:
Prime T-fal Specialty Nonstick Double Boiler 3 Quart Oven Safe 350F Cookware, Pots and Pans, Dishwasher Safe Silver/Black
4.7
(2,940) T-fal Specialty Nonstick Double Boiler 3 Quart Oven Safe 350F Cookware, Pots and Pans, Dishwasher Safe Silver/Black $35.99 View details
Cake Leveler

Essential for slicing the sponge layers evenly and creating a professional-looking cake.

We recommend:
Prime 567 PCS Cake Decorating Kit Baking Supplies with 3 Springform Pans Set, Cake Decorating Supplies Rotating Turntable, Decorating Tools, Cake Baking Supplies Set for Beginners and Cake Lovers
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Variations

If gluten-free is your preference, simply swap out the flour for your favorite gluten-free baking flour. For a vegan version, replace the eggs with a flaxseed mixture (1 tablespoon ground flaxseed mixed with 3 tablespoons of water per egg), and use dairy-free butter and chocolate. Make sure to opt for a vegan spreadable chocolate instead of Nutella, such as a hazelnut cocoa spread labeled vegan. These small changes ensure everyone can enjoy this delightful cake without compromising on flavor or texture.

Faq

  • Can I substitute the hazelnuts with other nuts?

    Absolutely! You can use almonds or walnuts, but make sure to toast them for added flavor.

  • What if I don't have a food processor?

    You can place the hazelnuts in a sturdy plastic bag and crush them with a rolling pin, though the texture might be slightly different.

  • How can I ensure my sponge cake layers are even?

    Use a cake leveler or a serrated knife to slice the layers, and make sure to measure the batter evenly between the pans before baking.

  • Can I prepare the cake ahead of time?

    Yes, you can bake the sponge cakes and prepare the filling in advance, then store them separately. Assemble the cake on the day you plan to serve it for maximum freshness.

  • How do I avoid curdling the butter when adding melted chocolate?

    Ensure the chocolate is at room temperature and add it gradually, one spoon at a time, while continuously whipping the butter.

  • Can I freeze the leftover cake?

    Yes, you can freeze the cake. Wrap it tightly in plastic wrap and aluminum foil before freezing. Thaw in the refrigerator before serving.

Nutrition facts

Ferrero Rocher cake
Recipe Yield:8 servings
Calories:Calories per serving: 500-600
Calories (Min - Max):500 - 600
Total Fat:35g
Saturated Fat:15g
Protein:8g
Total Carbohydrate:45g
Total Sugars:30g