Ingredients

The following ingredients have 12 Servings
  • 2 cups all-purpose flour
  • 2 cups granulated sugar
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup (1 stick) unsalted butter
  • 1 cup water
  • 1/2 cup creamy peanut butter
  • 1/2 cup vegetable oil
  • 2 large eggs, at room temperature
  • 1/2 cup milk, at room temperature
  • 1 teaspoon vanilla extract
  • 1/2 cup (1 stick) unsalted butter
  • 1/2 cup creamy peanut butter
  • 6 tablespoons milk
  • 1 teaspoon vanilla extract
  • 3 cups powdered sugar
  • 1/2 cup roasted peanuts, for topping

Instruction

  • Preheat oven to 350°F and grease a 9x13-inch pan with butter or nonstick spray.
  • In a large bowl, whisk together the flour, sugar, baking soda, and salt. Set aside.
  • In a large saucepan, heat the butter and water until it comes to a boil. Remove from heat and whisk in peanut butter and oil until smooth.
  • Let cool 2 minutes, then whisk in eggs, milk, and vanilla until well incorporated.
  • Add to dry ingredients and mix until smooth. Pour batter into prepared pan and bake until a toothpick inserted into the center comes out clean, 40-45 minutes.
  • Set pan on a wire rack to cool while you make the frosting:
  • To a medium saucepan, add the butter, peanut butter, and milk and bring to a rolling boil.
  • Remove from heat and stir in vanilla, followed by powdered sugar, 1 cup at a time.
  • Whisk until smooth, reheating a bit if needed, then pour over cake. If frosting is stiff, add a bit more milk.
  • Working quickly, spread frosting evenly over cake and top with peanuts. Slice, serve, and enjoy!