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Pistachio Sheet Cake with White Chocolate Buttercream Frosting Recipe

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4 from 7 reviews

Indulge in this moist and tender Pistachio Sheet Cake topped with a luscious white chocolate buttercream frosting. Perfectly balanced with ground pistachios for a nutty flavor and baked to golden perfection, this easy-to-make sheet cake is ideal for gatherings or sweet cravings.

Ingredients

Cake

  • 3¾ cups all purpose flour
  • 1⅝ cups granulated sugar
  • 1⅝ cups pistachios, ground
  • 3¾ teaspoons baking powder
  • 1¼ teaspoon salt
  • 3 large eggs, room temperature
  • 2⅛ cups whole milk
  • 1 cup vegetable oil
  • 2 teaspoons vanilla extract

Buttercream Frosting

  • 1⅛ cups salted butter, room temperature
  • 2¼ cups powdered sugar, sifted
  • 1½ cups white chocolate, melted
  • 2¼ teaspoons heavy cream

Instructions

  1. Preheat and prepare pan: Heat the oven to 350℉ (177℃). Spray a 9-inch x 13-inch baking pan with baking spray to prevent sticking and set aside.
  2. Mix dry ingredients: In a large bowl, whisk together the all purpose flour, granulated sugar, ground pistachios, baking powder, and salt to evenly distribute all dry ingredients.
  3. Mix wet ingredients: In a separate medium bowl, whisk together the eggs, whole milk, vegetable oil, and vanilla extract until well combined.
  4. Combine wet and dry: Pour wet ingredients over the dry mixture and stir gently until the batter is thoroughly combined without overmixing.
  5. Bake the cake: Pour the batter into the prepared baking pan, spreading it evenly. Bake for 40 minutes or until a toothpick inserted into the center comes out clean.
  6. Prepare frosting: While the cake bakes, beat the salted butter and sifted powdered sugar with an electric mixer until smooth, about 1-2 minutes.
  7. Add white chocolate: Mix in the melted white chocolate and heavy cream. Beat the mixture until light and fluffy, around 2-3 minutes.
  8. Frost cake: Once the cake has completely cooled, spread the white chocolate buttercream frosting evenly over the top.

Notes

  • For best texture and flavor, use fresh pistachios and grind them finely.
  • Allow the cake to cool completely before frosting to avoid melting the buttercream.
  • You can substitute vegetable oil with canola or light olive oil for a slightly different flavor.
  • Store leftover cake covered at room temperature for up to 2 days or in the refrigerator for up to 5 days.
  • To keep the frosting smooth, melt white chocolate gently using a double boiler or microwave in short bursts.