Peanut Butter Sheet Cake with Peanut Butter Frosting Recipe -

Peanut Butter Sheet Cake with Peanut Butter Frosting Recipe

Peanut Butter Sheet Cake with Peanut Butter Frosting is a heavenly dessert for peanut butter lovers. This cake is known for its moist, tender crumb and rich, creamy frosting, making

it a hit at parties, family gatherings, or as a special treat for any peanut butter enthusiast. This easy-to-make sheet cake offers the perfect balance of sweetness and peanut butter flavor.


Ingredients: For the Cake:

  1. 2 cups all-purpose flour
  2. 2 cups granulated sugar
  3. 1 teaspoon baking soda
  4. 1/2 teaspoon salt
  5. 1 cup unsalted butter
  6. 1 cup water
  7. 1/2 cup smooth peanut butter
  8. 1/2 cup buttermilk
  9. 2 large eggs
  10. 1 teaspoon vanilla extract

For the Peanut Butter Frosting:

  1. 6 tablespoons unsalted butter
  2. 1/2 cup smooth peanut butter
  3. 1/3 cup milk
  4. 1 teaspoon vanilla extract
  5. 3-4 cups powdered sugar, sifted



Step 1: Preheat Oven and Prepare the Pan

  • Preheat your oven to 350°F (175°C).
  • Grease and flour a 9×13 inch baking sheet or line it with parchment paper.

Step 2: Combine Dry Ingredients

  • In a large bowl, whisk together the flour, granulated sugar, baking soda, and salt. Set aside.

Step 3: Make the Batter

  • In a saucepan over medium heat, melt 1 cup butter. Add water and 1/2 cup peanut butter and bring to a boil.
  • Pour the peanut butter mixture over the dry ingredients, mixing until well combined.
  • In a separate bowl, whisk together the buttermilk, eggs, and vanilla extract. Add this to the batter and mix until smooth.
  • Pour the batter into the prepared baking sheet.

Step 4: Bake the Cake

  • Bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean.

Step 5: Prepare the Frosting

  • While the cake is baking, make the frosting. In a saucepan, melt 6 tablespoons butter with 1/2 cup peanut butter.
  • Stir in milk and bring the mixture to a boil.
  • Remove from heat and gradually mix in the powdered sugar and vanilla extract until smooth and creamy.

Step 6: Frost the Cake

  • While the cake is still warm, spread the peanut butter frosting evenly over the top.
  • Allow the frosting to set before cutting the cake into squares.



Cooking Note:

  • For a creamier frosting, adjust the amount of milk and powdered sugar to reach your desired consistency.


Serving Suggestions:

  • This Peanut Butter Sheet Cake is perfect as a dessert or a sweet treat for any occasion. It pairs well with a cup of coffee or a glass of milk.



  • For a richer peanut butter flavor, you can add chopped peanuts to the batter or sprinkle them on top of the frosting.
  • Ensure all ingredients are at room temperature for even mixing.


Prep Time: 20 minutes Cooking Time: 25 minutes Total Time: 45 minutes


Nutritional Information:

  • Calories: Approximately 400-450 per serving
  • Protein: 6g
  • Sodium: 300mg


Conclusion: Peanut Butter Sheet Cake with Peanut Butter Frosting is a delightful dessert that’s sure to satisfy any peanut butter craving. Its moist texture and rich flavor make it a crowd-pleaser, perfect for any gathering or just a cozy night in.

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