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A close up slice of old-fashioned peanut butter cake with thick frosting

Old-Fashioned Peanut Butter Cake

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5 from 12 reviews

Description

This classic sheet cake combines the nostalgia of an old-fashioned bakery treat with the convenience of a quick-mix method. Featuring a tender buttermilk crumb and a fluffy whipped peanut butter frosting, it is the perfect comfort dessert for busy weeknights or potluck gatherings.

Ingredients

  • 2 cups all-purpose flour
  • 1 teaspoon baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup unsalted butter, softened
  • 1/2 cup creamy peanut butter
  • 1 cup granulated sugar
  • 1/2 cup brown sugar, packed
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 3/4 cup buttermilk
  • 1/2 cup butter, softened (for frosting)
  • 1/2 cup creamy peanut butter (for frosting)
  • 2 cups powdered sugar
  • 2-3 tablespoons milk
  • 1 teaspoon vanilla extract (for frosting)

Instructions

  1. Preheat your oven to 350°F (175°C) and thoroughly grease and flour a 9×13 inch baking pan.
  2. In a medium bowl, whisk together the flour, baking powder, baking soda, and salt until well combined.
  3. In a large mixing bowl, beat together the softened butter, creamy peanut butter, granulated sugar, and brown sugar for approximately two minutes until light and fluffy.
  4. Add the eggs to the creamed mixture one at a time, beating well after each addition, then stir in the vanilla extract.
  5. Gradually add the dry flour mixture to the wet base, alternating with the buttermilk; begin and end with the flour and mix only until just combined.
  6. Pour the batter into the prepared pan and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
  7. Allow the cake to cool completely in the pan before preparing the frosting.
  8. To make the frosting, cream the butter and peanut butter together, then gradually beat in the powdered sugar, milk, and vanilla until the texture is light and spreadable.

Notes

For the most successful rise, ensure your eggs and buttermilk are brought to room temperature before mixing, as cold ingredients can cause the batter to separate. If you prefer a more textured finish, you can sprinkle a handful of chopped roasted peanuts over the frosting before it sets. Always store this cake in an airtight container at room temperature to maintain its signature moist crumb.

  • Prep Time: 15 mins
  • Cook Time: 35 mins
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

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Find it online: https://meltcake.com/old-fashioned-peanut-butter-cake/