Peanut Butter Sheet Cake with Peanut Butter Frosting


Experience the ultimate indulgence with our mouthwatering recipe for Peanut Butter Sheet Cake topped with luscious Peanut Butter Frosting. This delectable dessert combines the rich and creamy flavor of peanut butter with moist and tender cake layers, creating a heavenly treat that will delight your taste buds. In this article, we’ll guide you through the process of making this irresistible Peanut Butter Sheet Cake and share why it’s a must-have for peanut butter lovers everywhere.


For the Cake:

  • 2 cups all-purpose flour
  • 2 cups granulated sugar
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup unsalted butter
  • 1 cup water
  • 1/2 cup creamy peanut butter
  • 2 large eggs
  • 1/2 cup buttermilk
  • 1 teaspoon vanilla extract

For the Peanut Butter Frosting:

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


  1. Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan.
  2. In a large mixing bowl, whisk together the flour, sugar, baking soda, and salt until well combined.
  3. In a saucepan, combine the butter, water, and peanut butter. Bring to a boil over medium heat, stirring occasionally. Once boiling, remove from heat.
  4. Pour the hot peanut butter mixture over the dry ingredients in the mixing bowl and stir until smooth.
  5. Add the eggs, buttermilk, and vanilla extract to the batter and mix until well combined.
  6. Pour the batter into the prepared baking pan and spread it out evenly.
  7. Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted into the center comes out clean.
  8. While the cake is baking, prepare the peanut butter frosting. In a saucepan, melt the butter and peanut butter over medium heat, stirring constantly.
  9. Remove from heat and stir in the powdered sugar, milk, and vanilla extract until smooth and creamy.
  10. Once the cake is done baking, remove it from the oven and let it cool completely in the pan.
  11. Once the cake has cooled, spread the peanut butter frosting evenly over the top.
  12. Slice and serve this irresistible Peanut Butter Delight Sheet Cake, and enjoy every peanut buttery bite!
  13. Prep Time: 15 minutes | Total Time: 40 minutes | Kcal: Approx. 350 kcal per serving | Servings: Makes about 12 servings

Serving Tips:

  1. Slice Presentation: When serving Peanut Butter Sheet Cake with Peanut Butter Frosting, use a sharp knife to cut clean and even slices. Wipe the knife between cuts to ensure neat presentation.
  2. Garnish Options: Elevate the presentation of your cake slices by garnishing them with a sprinkle of chopped peanuts, a drizzle of melted chocolate, or a dusting of cocoa powder. These decorative touches add visual appeal and complement the flavors of the cake.
  3. Accompaniments: Serve slices of Peanut Butter Sheet Cake with a dollop of whipped cream or a scoop of vanilla ice cream for an extra indulgent treat. The creamy texture of the frosting pairs beautifully with the coolness of whipped cream or ice cream.
  4. Serve Chilled or at Room Temperature: Peanut Butter Sheet Cake with Peanut Butter Frosting can be served chilled straight from the refrigerator for a refreshing treat, or at room temperature for a softer texture. Consider your guests’ preferences and the ambient temperature when deciding how to serve the cake.

Storage Tips:

  1. Refrigeration: Store any leftover Peanut Butter Sheet Cake in an airtight container or covered with plastic wrap in the refrigerator. Properly stored, the cake will stay fresh for up to 3-4 days. Be sure to bring the cake to room temperature before serving to soften the frosting.
  2. Freezing Option: To freeze Peanut Butter Sheet Cake, wrap individual slices tightly in plastic wrap and place them in a freezer-safe container or resealable bag. Frozen cake slices can be stored for up to 1-2 months. Thaw slices in the refrigerator overnight before serving.
  3. Frosting Protection: To prevent the frosting from sticking to the wrapping, place a sheet of parchment paper or wax paper between the slices before wrapping them for storage. This will help preserve the appearance and texture of the frosting.
  4. Portion Control: If you anticipate having leftovers, consider cutting the cake into individual serving portions before storing. This makes it easier to thaw and serve only the amount needed without having to thaw the entire cake.


1. Can I use crunchy peanut butter instead of creamy for the cake and frosting?

  • Yes, you can use crunchy peanut butter if you prefer a bit of texture in your cake and frosting. Just keep in mind that the texture will be slightly different, but it will still taste delicious!

2. Can I make this cake ahead of time for a special occasion?

  • Absolutely! This Peanut Butter Sheet Cake with Peanut Butter Frosting is perfect for making ahead. Simply bake the cake as directed, allow it to cool completely, and then store it in an airtight container at room temperature for up to 2 days. Frost the cake just before serving for the best taste and texture.

3. Can I freeze this cake for later?

  • Yes, you can freeze this cake for later enjoyment. Wrap the cooled, unfrosted cake tightly in plastic wrap and aluminum foil, then place it in a freezer-safe container or bag. It can be frozen for up to 2-3 months. Thaw the cake overnight in the refrigerator before frosting and serving.

4. How can I store leftover cake?

  • If you have leftover cake, store it in an airtight container at room temperature for up to 2 days, or in the refrigerator for up to 4-5 days. Be sure to cover the cake well to prevent it from drying out.

5. Can I make this cake gluten-free?

  • Yes, you can make this cake gluten-free by using a gluten-free flour blend in place of all-purpose flour. Additionally, be sure to check that all other ingredients, such as baking powder and vanilla extract, are gluten-free as well.


With its irresistible combination of moist and tender cake layers and creamy peanut butter frosting, our Peanut Butter Sheet Cake is a dessert lover’s dream come true. Whether you’re celebrating a special occasion or simply craving a sweet indulgence, this cake is sure to impress. Follow our easy recipe and treat yourself to a slice of pure bliss with every bite.