The Chocolate Brownie Cake with Mascarpone is a luxurious and decadent dessert that combines the rich flavors of chocolate brownies with a luscious coconut-walnut filling and a delightful vanilla mascarpone buttercream. Topped with a velvety chocolate ganache, this cake is a true indulgence that will impress any crowd.

The origins of brownies can be traced back to the United States in the late 19th century. The exact story behind their creation is a matter of debate, with multiple claims and legends surrounding their invention. One popular tale credits Bertha Palmer, a socialite and owner of the Palmer House Hotel in Chicago, for requesting a dessert that was smaller than a cake but still easy to eat at the 1893 World’s Columbian Exposition. The result was a dense, chocolatey confection that eventually evolved into what we now know as brownies.

Mascarpone cheese, on the other hand, originates from Italy and is believed to have been developed in the Lombardy region. It is a rich and creamy cheese with a mild and slightly sweet flavor, making it an excellent addition to desserts like this cake.

The combination of chocolate brownies, coconut-walnut filling, and mascarpone buttercream creates a harmonious blend of textures and tastes that elevate the traditional brownie into a sophisticated and indulgent dessert.

INGREDIENTS

For the Brownie Layers:

• 1 cup unsalted butter, melted
• 2 cups granulated sugar
• 4 large eggs
• 1 cup all-purpose flour
• ½ cup unsweetened cocoa powder
• ½ teaspoon salt
• ½ teaspoon baking soda

For the Coconut Filling:

• 1 cup walnuts, measured then ground
• 1 cup coconut flakes
• ½ cup heavy cream
• ½ cup sugar
• 1 egg yolk
• 3 tbsp. butter, room temperature

For the Vanilla Mascarpone Buttercream:

• 3 sticks of butter, softened
• 8 oz mascarpone cheese, chilled
• 2½ cups powdered sugar
• 1 vanilla bean
• Pinch of salt

For the Chocolate Ganache:

• 8 ounces semisweet chocolate, chopped
• 2 tbsp. light corn syrup
• 3 tablespoons unsalted butter
• 1 cup heavy cream

INSTRUCTIONS

For the Brownie Layers:

1. Preheat the oven to 350°F (175°C).
2. Grease the bottom of three 8-inch round pans with melted butter or cooking spray.
3. In the bowl of an electric mixer, whisk together the melted butter and sugar until smooth. Add in each egg one at a time on low speed, whisking until well combined.
4. Using a large rubber spatula, gently stir in the flour, cocoa powder, baking soda, and salt until just combined.
5. Spread the brownie batter evenly into the prepared pans and bake for 25-30 minutes or until set.
6. Remove the brownie layers from the oven and let them cool completely before assembling the cake.

For the Coconut Filling:

1. Place the ground walnuts, coconut flakes, and butter in a large bowl and set aside.
2. In a medium saucepan over low/medium heat, stir together the heavy cream, sugar, and egg yolk until the mixture thickens and coats the back of a spoon (reaching 180 degrees F). Pour the hot custard immediately onto the walnut-coconut mixture and stir until the butter is melted. Let the filling cool completely to room temperature before topping the brownie layers.

For the Vanilla Mascarpone Buttercream:

1. In the bowl of an electric stand mixer fitted with the whisk attachment, cream the softened butter and chilled mascarpone cheese on medium speed until smooth and combined (about 2-3 minutes).
2. Add the powdered sugar, ½ cup at a time, and whisk until well-incorporated.
3. Scrape the seeds from the vanilla bean and add them, along with a pinch of salt, to the buttercream mixture. Continue whisking until everything is well combined.
4. If the frosting is too thick, add heavy cream one tablespoon at a time until it reaches the desired consistency.

For the Chocolate Ganache:

1. Place the chopped semisweet chocolate, corn syrup, and butter in a medium bowl.
2. Heat the heavy cream in a small saucepan over medium heat until it just begins to boil. Remove from heat and pour it over the chocolate. Let it stand for one minute, then stir until smooth. Allow the ganache to cool to room temperature.

To Assemble the Cake:

1. Remove the cooled brownie layers from the pans. Place the first cake layer on a cake plate.
2. Top the first layer with half of the coconut-walnut filling, spreading it evenly. Then add ⅓ of the vanilla mascarpone buttercream, spreading it evenly as well.
3. Repeat the process with the second brownie cake layer, adding the remaining coconut-walnut filling and another ⅓ of the frosting. The third (top) layer should be covered with frosting only, without the coconut mixture.
4. Pour the chocolate ganache on top of the cake, distributing it evenly and allowing it to drip down the sides of the cake.
5. Decorate with any remaining frosting and chocolate sprinkles, if desired.
6. Chill the cake for at least 2 hours before serving to set the layers and flavors.

Enjoy this exquisite Chocolate Brownie Cake with Mascarpone, a perfect dessert for special occasions or any time you want to treat yourself and your loved ones to a heavenly delight.