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Peanut Butter Sheet Cake


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  • Author: Isabella
  • Total Time: 50-60 minutes
  • Yield: 20 servings
  • Diet: Vegetarian

Description

Peanut Butter Sheet Cake is a rich, moist, and easy-to-make dessert packed with nutty flavor. Topped with creamy peanut butter frosting, this crowd-pleasing cake is perfect for potlucks, family gatherings, or satisfying your peanut butter cravings.

Peanut Butter Sheet Cake is a rich, moist, and easy-to-make dessert packed with nutty flavor. Topped with creamy peanut butter frosting, this crowd-pleasing cake is perfect for potlucks, family gatherings, or satisfying your peanut butter cravings.


Ingredients

For the Cake:

  • 2 cups all-purpose flour
  • 1 cup granulated sugar
  • 1/2 cup light brown sugar, packed
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup water
  • 1/2 cup unsalted butter
  • 1/2 cup creamy peanut butter
  • 1/4 cup vegetable oil
  • 1/2 cup buttermilk
  • 2 large eggs
  • 1 teaspoon vanilla extract

For the Peanut Butter Frosting:

  • 1/2 cup unsalted butter
  • 1/2 cup creamy peanut butter
  • 1/4 cup buttermilk
  • 2 cups powdered sugar
  • 1 teaspoon vanilla extract

Instructions

  • Preheat the Oven

    • Preheat your oven to 350°F (175°C).
    • Grease a 10×15-inch jelly roll pan (for a thinner cake) or a 9×13-inch baking pan (for a thicker cake).
  • Prepare the Dry Ingredients

    • In a large bowl, whisk together flour, granulated sugar, brown sugar, baking soda, and salt.
  • Heat the Wet Ingredients

    • In a saucepan over medium heat, combine water, butter, and peanut butter.
    • Stir continuously until smooth and bring to a gentle boil.
    • Remove from heat.
  • Mix the Batter

    • Pour the hot peanut butter mixture into the dry ingredients. Stir until well combined.
    • Add vegetable oil, buttermilk, eggs, and vanilla extract. Mix until smooth.
  • Bake the Cake

    • Pour the batter into the prepared pan, spreading it evenly.
    • Bake for 20-25 minutes, or until a toothpick inserted in the center comes out clean.
  • Prepare the Frosting

    • While the cake bakes, heat butter, peanut butter, and buttermilk in a saucepan over medium heat.
    • Stir until smooth and bring to a gentle boil.
    • Remove from heat and gradually whisk in powdered sugar and vanilla extract until smooth.
  • Frost the Cake

    • Let the cake cool for 15 minutes after baking.
    • Pour the warm frosting over the warm cake, spreading evenly.
  • Cool & Serve

    • Allow the cake to cool completely before slicing and serving.
  • Prep Time: 25 minutes
  • Cook Time: 20-25 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American