Royal Walnut Cake Recipe

This Royal Walnut Cake is a rich and decadent dessert made with toasted walnuts, soft sponge cake, and silky Russian buttercream. A perfect blend of nutty flavors, light texture, and indulgent chocolate ganache, this cake is ideal for holidays, birthdays, and special occasions. Infused with rum syrup for extra moisture and topped with a glossy chocolate ganache, this cake is a showstopper for any dessert lover.

Learn how to make this traditional walnut cake from scratch with simple ingredients and easy-to-follow steps. Whether you’re an experienced baker or a beginner, this recipe ensures a moist and flavorful cake every time. Serve it with coffee or tea for an elegant treat!

This Royal Walnut Cake is a decadent and elegant dessert featuring layers of soft, nutty sponge cake, luscious Russian buttercream, and a rich chocolate ganache. Infused with a touch of rum syrup, this cake is a show-stopping treat perfect for holidays and special occasions.

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Ingredients

For the Walnut Cake:

• 2 cups walnuts, halves and pieces
• 6 large eggs, room temperature
• 1 cup granulated sugar
• 1 cup all-purpose flour
• 1/2 tsp baking powder

For the Russian Buttercream:

• 3/4 cup sweetened condensed milk (about 2/3 of a 14 oz can)
• 2 large egg yolks
• 1 Tbsp water
• 1/2 tsp vanilla extract
• 1 1/2 cups unsalted butter (3 sticks), softened at room temperature

For the Simple Cake Syrup:

• 1/4 cup granulated sugar
• 1 cup warm water
• 3 Tbsp rum (such as Bacardi golden rum)

For the Chocolate Ganache:

• 4 oz semisweet chocolate chips (1/4 lb by weight, or 2/3 cup by dry measuring cup)
• 1/2 cup heavy whipping cream

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Instructions

Make the Walnut Cake:

1. Preheat oven to 350°F (175°C). Line two 9-inch round cake pans with parchment paper and lightly grease the sides.
2. Prepare walnuts: Pulse walnuts in a food processor until finely ground but not oily.
3. Whip eggs and sugar: In a large mixing bowl, beat eggs and sugar on high speed for 5-7 minutes until thick and pale.
4. Combine dry ingredients: In a separate bowl, whisk together flour, baking powder, and ground walnuts.
5. Fold together: Gently fold dry ingredients into the egg mixture in batches until combined, being careful not to deflate the batter.
6. Bake: Divide the batter evenly between the prepared pans and bake for 22-25 minutes, or until a toothpick inserted in the center comes out clean.
7. Cool: Let cakes cool in pans for 10 minutes, then transfer to a wire rack to cool completely.

Prepare the Russian Buttercream:

1. Heat condensed milk mixture: In a small saucepan, whisk together condensed milk, egg yolks, and water. Cook over low heat, stirring constantly, until slightly thickened (do not boil). Remove from heat and cool completely.
2. Beat butter: In a large bowl, beat softened butter until light and fluffy.
3. Combine: Gradually add the cooled condensed milk mixture and vanilla extract, beating until smooth and creamy.

Make the Cake Syrup:

1. Stir together sugar, warm water, and rum until sugar dissolves.

Make the Chocolate Ganache:

1. Heat heavy cream until steaming but not boiling. Pour over chocolate chips and let sit for 2 minutes.
2. Stir until smooth and glossy.

Assemble the Cake:

1. Slice cake layers: If cakes have domed tops, trim them with a serrated knife. Slice each cake in half horizontally to create four layers.
2. Soak layers: Brush each cake layer lightly with the prepared cake syrup.
3. Frost: Spread a generous layer of buttercream between each cake layer.
4. Cover the cake: Frost the outside with the remaining buttercream.
5. Decorate: Drizzle chocolate ganache over the cake, allowing it to drip down the sides.
6. Chill: Refrigerate for at least 1 hour before serving for best texture and flavor.

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Tips

• Use room temperature eggs and butter for a smooth batter and frosting.
• Toasting the walnuts before grinding enhances their flavor.
• Refrigerate the cake for at least an hour before serving to allow flavors to meld.
• If the buttercream looks curdled, keep beating until it smooths out.

Variations and Substitutions

• Nut-Free Option: Substitute ground walnuts with finely ground almonds or skip nuts entirely.
• Alcohol-Free: Replace rum with vanilla extract or omit it from the syrup.
• Chocolate Twist: Add cocoa powder to the buttercream for a chocolate version.
• Extra Flavor: Mix a bit of espresso powder into the chocolate ganache for a mocha touch.

FAQs

Can I make this cake ahead of time?

Yes! The cake layers can be baked a day in advance and stored covered at room temperature. The assembled cake can be refrigerated for up to 3 days.

How do I store leftovers?

Store in an airtight container in the fridge for up to 4 days. Let sit at room temperature for 15-20 minutes before serving.

Can I freeze this cake?

Yes, wrap individual cake layers in plastic wrap and freeze for up to 2 months. Thaw overnight before assembling.

Serving Suggestions

• Serve with a cup of espresso or black coffee.
• Garnish with chopped walnuts or chocolate shavings.
• Pair with a scoop of vanilla ice cream for an extra indulgent dessert.

Why You’ll Love This Recipe

• Rich, nutty flavor from the walnuts.
• Ultra-creamy buttercream that melts in your mouth.
• Perfect balance of sweetness with a hint of rum.
• Gorgeous presentation with dripping chocolate ganache.
• Ideal for special occasions, holidays, or birthdays!