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Perfect Marble Graduation Sheet Cake Recipe with Easy Chocolate Ganache

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A rich, moist marble sheet cake combining tender vanilla and chocolate batters swirled together, topped with a silky easy chocolate ganache. Perfect for graduations, celebrations, or any occasion that calls for a showstopper dessert.

Ingredients

Scale
  • 2 ½ cups (315 g) all-purpose flour
  • 2 ½ teaspoons baking powder
  • ½ teaspoon salt
  • 1 cup (227 g) unsalted butter, softened
  • 1 ¾ cups (350 g) granulated sugar
  • 4 large eggs, room temperature
  • 2 teaspoons pure vanilla extract
  • 1 cup (240 ml) whole milk, room temperature
  • ½ cup (50 g) unsweetened cocoa powder, sifted
  • 1 cup (240 ml) heavy cream
  • 8 ounces (225 g) dark chocolate, chopped (60-70% cocoa recommended)
  • 1 tablespoon unsalted butter (optional, for extra shine)

Instructions

  1. Preheat your oven to 350°F (175°C) and grease a 9×13-inch sheet pan with butter or non-stick spray. Line with parchment paper if desired.
  2. In a medium bowl, sift together the flour, baking powder, and salt. Set aside.
  3. In a large bowl, beat the softened butter and granulated sugar until light and fluffy, about 3-4 minutes with an electric mixer.
  4. Beat in the eggs one at a time, ensuring each is fully incorporated before adding the next. Stir in the vanilla extract.
  5. With the mixer on low, alternately add the dry flour mixture and whole milk in three additions, starting and ending with the flour. Mix just until combined.
  6. Scoop about 2 cups (480 ml) of batter into a separate bowl and stir in the sifted cocoa powder until smooth.
  7. Pour the vanilla batter evenly into the prepared pan. Drop spoonfuls of the chocolate batter over the top.
  8. Use a knife or skewer to gently swirl the batters together to create a marbled effect without overmixing.
  9. Bake for 35-40 minutes, or until a toothpick inserted in the center comes out clean or with a few moist crumbs.
  10. Cool the cake in the pan on a wire rack for at least 30 minutes before frosting.
  11. To make the ganache, heat the heavy cream in a small saucepan over medium heat until it just begins to simmer.
  12. Pour the hot cream over the chopped dark chocolate in a bowl. Let sit for 5 minutes, then whisk until glossy and smooth. Stir in the optional butter for extra shine.
  13. Pour the ganache evenly over the cooled cake and spread gently with an offset spatula. Let set at room temperature or chill briefly to firm up.

Notes

Use room temperature ingredients for best results. Avoid overmixing batter to keep cake tender. Let ganache sit on chocolate before whisking to avoid lumps. Cool cake completely before adding ganache to prevent melting and sliding. For gluten-free, use a 1:1 gluten-free flour blend. For dairy-free ganache, substitute coconut cream and dairy-free chocolate chips.

Nutrition

Keywords: marble cake, graduation cake, sheet cake, chocolate ganache, easy cake recipe, celebration cake, vanilla chocolate swirl

Find it online: https://atomicbite.com/perfect-marble-graduation-sheet-cake-recipe-with-easy-chocolate-ganache/