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CHOCOLATE RASPBERRY TRUFFLE LAYER CAKE

Shelly's
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Category: Cakes
    Prep Time:       Cook Time:       Total Time:  

For the cake:
11/2 cups (41/2 oz.) unsweetened cocoa powder
1 tbsp. espresso powder
11/2 cups boiling water
3/4 cup sour cream
1 tbsp. vanilla extract
3 sticks (12 oz.) unsalted butter, at room temperature
21/2 cups plus 2 tbsp. (181/4 oz.) sugar
3 large eggs
13/4 cups plus 2 tbsp. (91/4 oz.) all-purpose flour
11/4 tsp. baking soda
3/4 tsp. salt

For the raspberry filling:
16 oz. frozen raspberries, thawed
1/3 cup sugar
3 tbsp. cornstarch
1 tsp. lemon juice

For the ganache filling:
8 oz. bittersweet chocolate, finely chopped
1 cup heavy cream
3 tbsp. unsalted butter, at room temperature

For the raspberry frosting:
1 cup sugar
4 large egg whites
21 tbsp. unsalted butter, at room temperature
1/3 cup strained raspberry puree*
1/2 tsp. vanilla extract
Pink gel icing color (optional)

For the chocolate glaze:
4 oz. bittersweet chocolate, finely chopped
1/2 cup heavy whipping cream
1/4 cup light corn syrup
2 tsp. vanilla extract

For garnish:
Additional fresh raspberries

*For best flavor, use fresh organic raspberries.

To make the cake, preheat the oven to 350F. Grease and flour the edges of three 9-inch round cake pans, and line the bottoms with rounds of parchment paper. Combine the cocoa and espresso powder in a small bowl. Add in the boiling water and whisk together until smooth. Let cool slightly. Whisk in the sour cream.

In the bowl of an electric mixer, combine the butter and sugar. Beat together on medium-high speed until light and fluffy, about 5 minutes. Blend in the eggs one at a time, scraping down the bowl as needed. Beat in the vanilla. Combine the flour, baking soda and salt in a small bowl; stir together to combine. With the mixer on low speed, add the dry ingredients to the mixing bowl in three additions, alternating with the cocoa-sour cream mixture, beginning and ending with the dry ingredients. Beat each addition just until incorporated.

Divide the batter between the prepared baking pans. Bake 35 minutes, or until a toothpick inserted in the center comes out clean. Let cool in the pans about 15 minutes, then transfer the cakes to a wire rack to cool completely.

To make the raspberry filling, drain the thawed berries, reserving the juice in a liquid measuring cup. Add enough water so that the total liquid equals 1 1/4 cups. Add the liquid to a medium saucepan with the sugar and cornstarch. Heat over medium-high heat, whisking occasionally, until the mixture begins to bubble and thicken. Continue whisking so no lumps form. Once thickened, remove from the heat and whisk in the lemon juice. Fold in the drained berries with a spatula. Cover and chill until ready to use. (The filling will continue to thicken as it chills.)

To make the ganache, place the chopped chocolate in a heatproof bowl. Heat the cream in a saucepan and bring to a simmer. Immediately remove from the heat and pour the hot cream over the chopped chocolate. Let stand 1-2 minutes, then whisk together until a smooth, thick ganache is formed. Whisk in the butter 1 tablespoon at a time until completely incorporated. Let the ganache sit to thicken a bit so that it is suitable for spreading and piping. (To speed thickening, place the bowl in the fridge or freezer and whisk every 10 minutes to ensure even cooling until the desired consistency is reached.) Transfer about 1/2 cup of the thickened ganache to a pastry bag fitted with a plain round tip about 1/2-inch in diameter. Reserve another 1/2 cup of ganache in a small bowl or container. (This can be used later for decorative detailing, if desired.)

To assemble the cake, place one of the cooled cake layers on a cake board or serving platter. Spread 1/2 cup of the ganache in an even layer over the cake. Using the reserved ganache in the pastry bag, pipe a border around the perimeter of the cake layer. This will act as a well to help hold in the raspberry filling. Spoon some of the raspberry filling inside the ganache border in an even layer. Top with another layer of cake and repeat this process, layering with another 1/2 cup of ganache and additional raspberry filling. Top with the remaining cake layer.

To make the raspberry frosting, combine the sugar and egg whites in a heatproof bowl set over a pot of simmering water. (I use my mixer bowl here to dirty one less dish.) Heat, whisking frequently, until the mixture reaches 160 degrees and the sugar has dissolved. Transfer the mixture to the bowl of a stand mixer fitted with the whisk attachment. Beat on medium-high speed until stiff peaks form and the mixture has cooled to room temperature, about 8 minutes. (The bowl should be cool to the touch.) Reduce the speed to medium and add the butter, 2 tablespoons at a time, adding more once each addition has been incorporated. If the frosting looks soupy or curdled, continue to beat on medium-high speed until thick and smooth again, about 3-5 minutes more (or longer – don’t worry, it will come together!) Blend in the raspberry puree and vanilla until smooth and completely incorporated, scraping down the sides of the bowl as needed. If desired, tint with pink icing gel to achieve your desired shade.

Frost the top and sides of the assembled cake with the raspberry buttercream, smoothing the surface as much as possible. Chill for at least 30 minutes.

To make the chocolate glaze, place the chocolate in a medium bowl. Heat the cream in a small saucepan over medium heat until simmering. Pour the hot cream over the chocolate and let sit 1-2 minutes. Whisk until the mixture is smooth and homogenous. Blend in the corn syrup and vanilla. Pour the glaze into a pitcher or measuring cup and let cool for 10 minutes. (Do not let the glaze cool longer or it may become difficult to pour over the cake.) Slowly pour the glaze over the cake, ensuring that the top is covered and the glaze drips over the sides. Let the glaze set about 5-10 minutes. Meanwhile, bring the remaining reserved ganache to a consistency for piping. (You can microwave in 5 second intervals on low power - it won’t take long to rewarm. If you overshoot and the ganache becomes too thin, simply chill again in the fridge or freezer until it is thick enough to pipe.) Transfer the ganache to a pastry bag fitted with a decorative tip. Pipe swirls of ganache around the edge of the top of the cake and top each swirl with a fresh raspberry. Chill the cake until ready to serve.


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