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Buttermilk Sheet Cake

  • Author: Cookies & Cups
  • Yield: serves 12 1x




  • 2 cups granulated sugar
  • 2 cups all purpose flour
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon kosher salt
  • 1 cup butter, melted
  • 1 cup boiling water
  • 2 eggs, lightly beaten
  • 2 teaspoons vanilla
  • 1/2 cup buttermilk


  • 1/2 cup butter, melted
  • 4 cups powdered sugar
  • 3 tablespoons milk
  • 1 teaspoon vanilla extract



  1. Preheat oven to 400°F/200°C. Coat an 11×17 rimmed baking sheet with baking spray and set aside.
  2. In a large bowl whisk together the sugar, flour, baking soda and salt. Whisk in the butter and water until combined. Next whisk in the eggs, vanilla and buttermilk until smooth.
  3. Pour the batter into the prepared pan and bake for 15-18 minutes until a toothpick inserted in the center comes out clean.
  4. Place the cake on a wire rack to begin cooling and immediately make the frosting.
  5. In another large bowl whisk together the butter, powdered sugar, milk and vanilla until no lumps remain. Pour immediately onto the warm cake.
  6. Allow the cake to cool before serving.

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