Peanut Butter Sheet Cake with Peanut Butter Frosting


For the Cake:

  • 1 box of your favorite cake mix (or homemade recipe—see notes below)
    • Tip : Use yellow, chocolate, or devil’s food cake mix for simplicity. For homemade, use a standard 2-layer cake recipe.
  • Eggs, oil, water, or other ingredients required by your chosen cake mix or recipe

For the Peanut Butter Frosting:

  • 1 cup (2 sticks) unsalted butter, softened
  • 1 cup creamy peanut butter (use natural or store-bought, depending on preference)
  • 4 cups powdered sugar, sifted
  • 1 teaspoon vanilla extract
  • ¼–½ cup heavy cream or milk (adjust for desired consistency)
  • Pinch of salt (optional, to balance sweetness)

Optional Toppings:

  • Crushed peanuts
  • Chocolate drizzle (melted chocolate or ganache)
  • Sprinkles

Step-by-Step Instructions

1. Bake the Cake

  • Preheat your oven according to the instructions on your cake mix or recipe.
  • Grease and flour two 9-inch round cake pans or line them with parchment paper for easy removal.
  • Prepare the cake batter as directed (using eggs, oil, water, etc.) and divide it evenly between the prepared pans.
  • Bake until a toothpick inserted into the center comes out clean (usually 25–30 minutes). Let the cakes cool in the pans for 10 minutes, then transfer them to a wire rack to cool completely.

2. Make the Peanut Butter Frosting

  • In a large mixing bowl, beat the softened butter and peanut butter together using a hand mixer or stand mixer until smooth and creamy.
  • Gradually add the powdered sugar , one cup at a time, mixing on low speed to avoid a sugar cloud. Once all the sugar is incorporated, increase the speed and beat until light and fluffy.
  • Add the vanilla extract and a pinch of salt , if using. Slowly pour in the heavy cream or milk , one tablespoon at a time, until the frosting reaches your desired consistency. Beat for an additional 2–3 minutes to ensure it’s light and airy.

3. Assemble the Cake

  • Place one cake layer on a serving plate or cake stand. Spread a generous layer of peanut butter frosting on top.
  • Add the second cake layer and frost the top and sides of the cake with the remaining frosting. Use a spatula or bench scraper for a smooth finish or create decorative swirls for a rustic look.

4. Add Finishing Touches

  • Sprinkle crushed peanuts over the top or press them into the sides of the cake for added texture.
  • Drizzle melted chocolate or caramel sauce over the cake for an extra touch of indulgence.

Tips for Success

  • Room Temperature Ingredients : Ensure the butter and peanut butter are softened for a smooth, lump-free frosting.
  • Adjust Sweetness : If the frosting is too sweet, add a pinch more salt or a splash of vanilla extract to balance the flavors.
  • Layering Tips : To prevent crumbs in your frosting, spread a thin “crumb coat” of frosting on the cake first, chill it for 15–20 minutes, then apply the final layer.
  • Storage : Store leftovers in an airtight container at room temperature for up to 2 days or refrigerate for up to 5 days. Bring to room temperature before serving.

Serving Suggestions

This Cake with Peanut Butter Frosting pairs beautifully with:

  • A cold glass of milk or a hot cup of coffee for a cozy treat.
  • Fresh berries like strawberries or raspberries for a pop of color and freshness.
  • A scoop of vanilla ice cream for an over-the-top dessert experience.

Final Thoughts

This Cake with Peanut Butter Frosting is the ultimate indulgence, combining the comforting flavors of cake and peanut butter in every bite. It’s rich, creamy, and oh-so-satisfying—a dessert that’s guaranteed to impress your family, friends, or anyone lucky enough to try it.

So preheat your oven, grab your ingredients, and get ready to create a cake that’s as delicious as it is unforgettable. Whether you’re celebrating a special occasion or simply treating yourself, this dessert is worth every bite. 🎂🥜✨


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