02/01/2026
Chocolate Walnut Mocha Cake With Bittersweet Ganache & Caramel Nut Shards
📝 Ingredients
The Mocha Walnut Sponge
2 cups All-Purpose Flour
¾ cup Dark Cocoa Powder (Dutch-processed)
2 cups Granulated Sugar
1 ½ tsp Baking Powder
1 ½ tsp Baking Soda
1 tsp Sea Salt
2 Large Eggs, room temperature
1 cup Whole Milk
½ cup Vegetable Oil
1 tbsp Pure Vanilla Extract
1 cup Hot Water mixed with 2 tsp Instant Espresso Powder
½ cup Walnuts, very finely ground
The Caramel Nut Shards
1 cup Walnut halves, toasted
½ cup Granulated Sugar
2 tbsp Water
1 tbsp Unsalted Butter
1 pinch Sea Salt
The Bittersweet Mocha Ganache
10 oz Bittersweet Chocolate (60% or higher), chopped
1 cup Heavy Cream
1 tbsp Instant Espresso Powder
2 tbsp Unsalted Butter, softened
The Garnish
Extra Caramelized walnut shards
Dark Chocolate curls
A dusting of Cocoa Powder
Whole Walnut halves
👨🍳 Instructions
1. Prepare the Oven and Pans
Preheat your oven to 350°F (175°C).
Grease two 8-inch round cake pans. Line the bottoms with parchment paper and dust the sides with cocoa powder for an easy release.
2. Create the Mocha Walnut Batter
In a large bowl, sift together the flour, cocoa powder, sugar, baking powder, baking soda, and salt.
Whisk in the ground walnuts.
Add the eggs, milk, oil, and vanilla. Beat on medium speed for 2 minutes.
Slowly stir in the hot espresso water by hand. The batter will be thin, which creates a very moist, tender crumb.
3. Bake the Cake Layers
Divide the batter evenly between the two pans.
Bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean.
Cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.
4. Make the Caramel Nut Shards
In a small saucepan, combine the sugar and water. Heat over medium-high without stirring until the mixture turns a deep amber caramel.
Stir in the butter, salt, and toasted walnut halves.
Pour the mixture onto a parchment-lined baking sheet and spread it out.
Once hardened, break the brittle into large, decorative shards.
5. Prepare the Bittersweet Ganache
Place the chopped bittersweet chocolate and espresso powder in a heatproof bowl.
Heat the heavy cream until it just begins to simmer, then pour it over the chocolate.
Let it sit for 5 minutes, then whisk gently until smooth and glossy.
Stir in the softened butter. Allow the ganache to cool at room temperature until it reaches a spreadable, thick consistency.
6. Assemble the Cake
Place the first cake layer on a serving plate. Spread a layer of bittersweet ganache over the top.
Sprinkle some small broken pieces of the nut brittle over the ganache for texture.
Top with the second cake layer.
7. Frost and Decorate
Use the remaining ganache to frost the top and sides of the cake.
Decorate the top of the cake by standing the large caramel nut shards upright in the center.
Garnish with chocolate curls and a final dusting of cocoa powder.
8. Final Chill
Refrigerate the cake for at least 1 hour to allow the ganache to set firmly before slicing.
🥗 Serving Suggestions
Pairing: Serve with a side of unsweetened whipped cream to balance the intensity of the bittersweet chocolate.
Beverage: Complements a hot cup of black coffee or a smooth glass of cold-brew.
Storage: Store in an airtight container in the refrigerator for up to 4 days.
📊 Nutrition Information (Per Serving)
Serves 12
Calories: 535 kcal
Total Fat: 32g
Saturated Fat: 17g
Cholesterol: 75mg
Sodium: 315mg
Total Carbohydrates: 60g
Dietary Fiber: 4g
Sugars: 43g
Protein: 8g
