Blackberry and White Chocolate Layer Cake

Photograph: Mimi Ritzen Crawford

This beautiful lemon layer cake is accented with blackberry preserves, white chocolate icing, and wafer cookies.

Note: For the cookies, I used Pepperidge Farm "Pirouettes." If you can't find vanilla, substitute chocolate.

About the author: María del Mar Sacasa is a recipe developer, food stylist, and author of the food blog High Heels & Frijoles. Behind her girly façade lurks a truck driver's appetite. Read about her cravings and suffer through her occasional rants on Twitter @HHandFrijoles and Pinterest.

Blackberry and White Chocolate Layer Cake

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About This Recipe

Yield:Serves 10 to 12
Active time:2 hours
Total time:5 hours
Special equipment:2 (9-inch) round baking pans, parchment paper, food processor, electric mixer, 2 cooling racks, medium heavy-bottomed saucepan, cake stand or serving plate, serrated knife, offset spatula, pastry brush
This recipe appears in: Let Them Eat: Blackberry White Chocolate Layer Cake

Ingredients

  • For the Lemon Cake
  • Baking spray
  • 1 3/4 cups sugar
  • 2 tablespoons freshly grated zest and 1/4 cup juice from 3 lemons
  • 2 1/4 cups cake flour
  • 2 teaspoons baking powder
  • 1 teaspoon baking soda
  • 3/4 cup milk, at room temperature
  • 1 teaspoon pure vanilla extract
  • 4 large eggs, separated and at room temperature
  • 1 teaspoon salt
  • 2 sticks (8 ounces) unsalted butter, at room temperature
  •  
  • For the White Chocolate Icing
  • 1 1/2 cups sugar
  • 1 tablespoon finely grated zest and 3/4 cup juice from 6 to 8 lemons
  • 1/4 cup all-purpose flour
  • 1/4 cup cornstarch
  • 1/2 teaspoon salt
  • 1 1/2 cups milk
  • 10 ounces white chocolate, finely chopped or 10 ounces white chocolate chips
  • 1 tablespoon pure vanilla extract
  • 2 sticks (8 ounces) unsalted butter, cut into tablespoon-sized pieces and at room temperature
  •  
  • For the Assembly
  • 2 cups blackberry jam or preserves
  • 55 vanilla rolled wafer cookies (See Notes)
  • 10 ounces white chocolate, finely chopped or 10 ounces white chocolate chips
  • 1/2 cup heavy cream
  • 2 tablespoons vegetable shortening
  • 2 teaspoons juice from 1 lemon
  • 1/8 teaspoon salt
  • 6 cups fresh blackberries

Procedures

  1. 1

    For the Lemon Cake: Lightly coat two 9-inch round cake pans with baking spray. Line bottoms with parchment paper rounds and coat once again with baking spray. Adjust oven rack to middle position and preheat oven to 350°F. In food processor, pulse 1 1/2 cups sugar and lemon zest until no zest strands remain. Whisk flour, baking powder, and baking soda together in medium bowl; reserve. Combine milk, lemon juice, and vanilla in glass measuring cup; reserve.

  2. 2

    In bowl of stand mixer fitted with the whisk attachment, whip egg whites and salt on medium speed until soft peaks form, about 2 minutes. Gradually add remaining 1/4 cup sugar and continue whipping until stiff peaks form, 1 to 2 minutes longer. Transfer whites to separate bowl.

  3. 3

    Beat butter and lemon sugar with paddle attachment on medium speed until light and fluffy, about 2 minutes. Add egg yolks, one at a time, beating well after each addition. Add flour mixture in three additions, alternating with milk mixture.

  4. 4

    Stir 1/3 of egg whites into batter until fully incorporated. With rubber spatula, fold in remaining egg whites. Divide batter equally between prepared pans.

  5. 5

    Bake until tester inserted in center of cakes comes out clean, 20 to 25 minutes. Transfer cakes to cooling racks and cool 10 minutes in pans. Turn cakes out directly onto racks, peel off and discard parchment paper, then invert so tops are facing up. Cool completely, about 1 hour.

  6. 6

    For the White Chocolate Icing: Pulse sugar and lemon zest in food processor until no zest strands remain. Bring lemon juice and lemon sugar to boil over medium-high heat in medium heavy-bottomed saucepan. Cook until reduced to 1/3 cup, 10 to 15 minutes.

  7. 7

    Combine flour, cornstarch, and salt in medium bowl. Whisk in milk until smooth. Strain mixture into medium saucepan and cook over medium heat, whisking constantly, until mixture comes to a boil and thickens, 5 to 7 minutes. Stir in lemon mixture, white chocolate, and vanilla. Transfer mixture to large bowl and cool to room temperature, stirring occasionally, 1 to 2 hours. Alternatively, place bowl in ice bath and stir constantly until cooled, about 10 minutes.

  8. 8

    Beat milk mixture on low speed with whisk attachment until combined. Add butter, 1 piece at a time, waiting for each piece to be incorporated prior to adding the next. Increase mixer speed to medium-high and beat until frosting is light and fluffy, about 5 minutes.

  9. 9

    To Assemble: With serrated knife, cut each cake in half. Arrange one cake layer on cake stand or serving plate. Stir blackberry jam to loosen, then, with offset spatula, spread 1 cup on cake. Press second cake layer on top and, with clean offset spatula, spread with about 3/4 cup icing. Repeat procedure with remaining 1 cup blackberry jam and cake.

  10. 10

    Ice top and sides of cake. Press cookies into sides of cake.

  11. 11

    Bring cream and shortening to simmer in small saucepan or in bowl in microwave. Place chocolate in medium bowl. Add cream and stir until smooth. Stir in lemon juice and salt.

  12. 12

    With a pastry brush, paint cookies with melted chocolate mixture. Once cookies are coated, repeat procedure until no chocolate remains.

  13. 13

    Refrigerate 20 to 30 minutes to set. Top cake with blackberries. Serve.

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