Ingredients

  • Baking spray with flour
  • 1 (15.87-ounce) box organic vanilla cake mix
  • 3 large eggs
  • ½ cup (1 stick) unsalted butter, melted, plus 1/4 cup (1/2 stick), softened
  • ¼ cup buttermilk
  • ¼ cup lemon juice
  • 1 cup blackberries, plus more for garnish
  • 4 ounces cream cheese, softened
  • 1 tablespoon seedless blackberry jam
  • 2 ¼ cups confectioners' sugar

Ready In 140 Minutes

Servings: 16

Cooking Instructions

Step 1

  • Preheat oven to 350°F. Coat a 9-inch springform pan with baking spray.
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Step 2

  • Combine cake mix, eggs, 1/2 cup melted butter, buttermilk and lemon juice in a large bowl. Beat with an electric mixer on medium-high speed until completely combined and smooth, about 2 minutes. Gently fold in blackberries.
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  • Length: 2 minutes

Step 3

  • Pour the batter into the prepared pan and smooth the top.
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Step 4

  • Bake until a wooden pick inserted in the center comes out clean, 45 to 50 minutes.
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  • Length: 45 minutes

Step 5

  • Let cool in the pan on a wire rack for 20 minutes. Gently run an offset spatula around the sides of the cake; remove the sides from the pan. Gently remove the cake from the bottom of the pan.
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  • Length: 20 minutes

Step 6

  • Let the cake cool completely on the rack, about 1 hour.
  • Length: 60 minutes

Step 7

  • Beat cream cheese, jam and the remaining 1/4 cup softened butter in a large bowl with an electric mixer on medium speed until completely smooth, about 2 minutes. Reduce speed to low and gradually add confectioners' sugar. Increase speed to medium-high and beat until light and fluffy, about 1 minute.
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  • Length: 3 minutes

Step 8

  • Place the cooled cake on a serving platter and spread frosting over the top and sides of the cake.
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Step 9

  • Garnish with blackberries, if desired.
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