Chocolate Truffle Cake

An edible masterpiece of chocolate, with a subtle orange flavor, this cake is the perfect finale to a very special dinner. Layers of dark chocolate cake alternate with whipped ganache, then it is coated with a shiny glaze.

Recipe courtesy of Sarabeth Levine, from Sarabeth's Bakery: From My Hands to Yours
TOTAL TIME: 8 hr
Prep: 30 min
Inactive Prep: 7 hr 30 min
Cook: --
 
YIELD: Makes 12 servings
LEVEL: Intermediate

ingredients

ORANGE SYRUP:
  • 2/3 cup Simple Syrup (see end)
  • 1 tablespoon orange-flavored liqueur, such as Grand Marnier
    WHIPPED GANACHE:
    • 2 1/4 cups heavy cream, divided 14 ounces semisweet or bittersweet chocolate
    • (no more than 62 percent cacao), finely chopped
      CHOCOLATE GLAZE:
      • 3/4 cup heavy cream
      • 2 tablespoons freshly brewed espresso or
      • 1 1/2 teaspoons instant espresso powder dissolved in 2 tablespoons boiling water
      • 2 tablespoons superfine sugar
      • 8 ounces semisweet or bittersweet chocolate (no more than 62 percent cacao), finely chopped
      • 2 tablespoons light corn syrup
      • Chocolate pearls, for garnish
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      Directions

      Assemble the cake (find the recipe here) at least 1 day before serving so the layers can firm in the refrigerator.

      To make the orange syrup, stir the simple syrup and liqueur together.

      To make the whipped ganache, bring 3/4 cup plus 2 tablespoons of the cream to a simmer in a medium saucepan over medium heat. Put the chocolate in a heatproof bowl. Add the hot cream and let stand until the chocolate softens, about 3 minutes. Whisk until smooth. Let cool until tepid but still fluid, about 15 minutes.

      Whip the remaining 1 1/4 cups plus 2 tablespoons cream in the chilled bowl of a heavy-duty stand mixer fitted with the whisk attachment on medium speed only until the cream holds its shape, just before soft peaks begin to form. Pour the whipped cream over the cooled chocolate mixture and fold together with a silicone spatula. Do not overmix, or the ganache will be grainy. Transfer 1/2 cup of the ganache to a small bowl and set aside.

      To assemble the cake, transfer the cake, with its cutting board, to the work surface. Using an 8 by 3-inch metal cake ring as a template, cut out two 8-inch rounds of cake from opposite corners of the chocolate cake. Cut out two half-rounds of cake from the remaining cake, and save the scraps. The two half-rounds will be put together, with the reserved scraps cut to fill in the gap, to become the center cake layer.

      Place the cake ring on a half-sheet pan. Insert an 8-inch cardboard round, white side up, inside the ring. Place a whole cake layer in the ring, and drizzle and brush with about 3 1/2 tablespoons of the syrup. Top with half of the whipped ganache filling, and spread evenly. Top with the partial cake layers, and fill in the gap with trimmings of the reserved cake scraps. Top with a smaller cardboard round and press gently to level the layers. Remove the cardboard round. Drizzle and brush the layer with another 3 1/2 tablespoons syrup. Spread with the rest of the filling. Add the final cake layer, cover with the smaller cardboard round, and press gently to level the layers. Remove the cardboard round. Drizzle and brush the cake with the remaining syrup. Using a small offset spatula, spread the reserved 1/2 cup filling over the top cake layer to make a smooth surface that fills any small holes. Refrigerate the cake until completely chilled, at least 6 hours or overnight.

      Remove the cake from the refrigerator. Place on the work surface. Rinse a kitchen towel under hot water and wring it out. Wrap the hot, moist towel around the sides of the cake ring, being careful not to get water on the top of the cake. Let stand for about 30 seconds. Lift up on the ring to remove it. (If it doesn't remove easily, moisten the towel again and reapply to the sides.) Place the cake on a small round wire cake rack set on a half-sheet pan. Using a small offset spatula rinsed under hot water and dried, smooth the sides of the cake to even out the exposed ganache between the layers. Refrigerate the cake on the rack until the outer layer of ganache is very firm, about 30 minutes.

      Meanwhile, make the glaze. Bring the cream, espresso, and sugar just to a simmer in a small saucepan over medium heat. Remove from the heat and add the chocolate. Let stand until the chocolate softens, about 3 minutes. Add the corn syrup and stir well with a silicone spatula until the chocolate is melted and the glaze is smooth. Do not whisk, as this will create bubbles that will mar the surface of the glaze. Strain into a 2-cup glass measuring cup. Let stand until tepid but still liquid and pourable, about 15 minutes.

      Transfer the cake on its wire cake rack to a room-temperature half-sheet pan. About 1 inch from the top edge of the cake, pour some of the glaze in a circle around the outside edge of the cake. Pour the remaining glaze in the center of the cake. Using a large offset metal spatula, quickly smooth the glaze over the top of the cake, letting the excess run down the sides. If needed, use the spatula to scrape up the glaze on the pan, and pour it back over the top of the cake to fill in any unglazed areas. Transfer the cake on the rack to a clean half-sheet pan. Refrigerate until the glaze sets, at least 1 hour. (The cake can be made up to 1 day ahead, covered with a cake dome, and refrigerated.) Lightly press small handfuls of the chocolate pearls along the bottom edge of the cake. Transfer the cake to the serving dish, and sprinkle more along the top edge of the cake, letting them fall randomly on the plate. Slice the cake with a sharp knife (dipped in hot water and wiped dry before each cut), and serve.

      Simple Syrup:

      1 cup granulated sugar
      1 cup water

      Combine the sugar and water in a small saucepan. Bring to a boil over medium heat, stirring constantly.

      Stop stirring and boil for 1 minute. Cool completely. (The syrup can be stored in a covered container and refrigerated for up to 2 months.)

      Makes about 1 1/3 cups
      Baker's Note: It is important to mask the top of the cake with whipped ganache to give it a smooth surface so the final glaze is equally smooth. After the cake is chilled and the ring is removed, smooth the sides of the cake. Valrhona chocolate pearls make a very elegant finish to this cake. Or use your imagination to come up with alternatives.

      Recipe courtesy of Sarabeth Levine, from Sarabeth's Bakery: From My Hands to Yours

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      5

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      • on January 10, 2012

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        An incredible show stopping dessert. The subtle orange flavor from the zest and the dense cake make this one to remember and use for any occasion. One tip though, having a rack to place the cake on when pouring on the glaze is a must. It gives it that, "professionally finished" look.

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