Irresistible Peanut Butter Sheet Cake with Peanut Butter Frosting



Prepare your taste buds for a symphony of nutty indulgence as we unveil the masterpiece that is our Peanut Butter Sheet Cake with Peanut Butter Frosting. In the world of desserts, few combinations rival the classic and irresistible pairing of peanut butter and cake. This recipe, however, takes that divine union to new heights, delivering a moist and decadent sheet cake crowned with a velvety peanut butter frosting. Every slice is a celebration of the rich, nutty goodness that transcends the ordinary, making it the perfect centerpiece for any occasion.

As you embark on this culinary adventure, imagine a confluence of textures and flavors that dance on your palate – the tender crumb of the cake, the creamy embrace of the frosting, and the lingering nuttiness that leaves you yearning for just one more bite. This Peanut Butter Sheet Cake is not just a dessert; it’s a symphony of taste, a composition of indulgence that will have you savoring every moment of its creation and every morsel of its consumption.

But before you embark on this delectable journey, let’s delve into the ingredients and step-by-step instructions that will guide you through the creation of this peanut butter masterpiece. Get ready to impress your taste testers and create a dessert sensation that will be remembered long after the last crumb has vanished.


For the Cake:

  • 2 cups all-purpose flour
  • 2 cups granulated sugar
  • 1 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1 cup unsalted butter
  • 1 cup water
  • 1/2 cup creamy peanut butter
  • 2 large eggs, lightly beaten
  • 1/2 cup buttermilk
  • 1 teaspoon vanilla extract

For the Frosting:

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


  1. Preheat your oven to 350°F (175°C) and grease a baking sheet.
  2. In a large mixing bowl, combine flour, sugar, baking soda, and salt.
  3. In a saucepan, melt butter and add water and peanut butter. Bring to a boil.
  4. Pour the peanut butter mixture over the dry ingredients and mix well.
  5. Add eggs, buttermilk, and vanilla extract. Mix until smooth.
  6. Pour the batter into the prepared baking sheet and bake for 20-25 minutes or until a toothpick inserted comes out clean.

For the Frosting:

  1. In a saucepan, melt butter and peanut butter together.
  2. Add milk and bring to a boil.
  3. Remove from heat and stir in confectioners’ sugar and vanilla extract until smooth.
  4. Spread the frosting over the cooled cake.

Serving Tips:

  1. Serve warm slices with a scoop of vanilla ice cream for a delightful contrast.
  2. Pair with a dollop of whipped cream and a sprinkle of chopped peanuts for added texture.
  3. Garnish each serving with a drizzle of chocolate sauce for a decadent touch.
  4. Accompany with a side of fresh berries to balance the richness of the cake.
  5. Dust individual slices with powdered sugar for an elegant presentation.
  6. Top with banana slices for a delightful peanut butter and banana combination.
  7. Serve as the centerpiece of a dessert platter with an assortment of other treats.
  8. Cut the cake into bite-sized squares for a delightful finger-food dessert option.
  9. Add a touch of sea salt to enhance the flavor profile.
  10. Experiment with different nut varieties in the frosting for a unique twist.
  11. Pair with a cup of coffee or tea for a cozy dessert experience.
  12. Customize each serving with a drizzle of caramel for an extra layer of sweetness.

Storage Tips:

  1. Store the cake in an airtight container at room temperature for up to 3 days.
  2. For longer storage, refrigerate the cake for up to a week.
  3. Wrap individual slices in plastic wrap and freeze for up to 3 months.
  4. Thaw frozen slices in the refrigerator before serving.
  5. Ensure the cake is completely cooled before storing to prevent condensation.
  6. Consider slicing the cake before freezing for convenient portioning.
  7. Separate layers with parchment paper to prevent sticking during freezing.
  8. Place the cake in a cake carrier to maintain freshness during transportation.
  9. For added moisture, place a slice of bread in the container with the cake.
  10. Freeze unfrosted cake and add frosting before serving for a freshly-made taste.
  11. Store frosting separately in an airtight container to maintain its creamy texture.
  12. Reheat slices in the microwave for a warm and gooey treat.


  1. Can I use crunchy peanut butter for added texture?
  2. Is it necessary to use buttermilk, or can I substitute with regular milk?
  3. Can I make this cake ahead of time and frost it later?
  4. How can I prevent the frosting from becoming too thick or too runny?
  5. Can I use natural peanut butter in the frosting?
  6. What size should the baking sheet be for this recipe?
  7. Can I use a different type of flour, such as whole wheat flour?
  8. Is it possible to make this cake gluten-free?
  9. Can I substitute margarine for butter in the frosting?
  10. How can I adjust the sweetness of the cake and frosting to my liking?
  11. Can I add chocolate chips or chunks to the cake batter?
  12. What is the best way to reheat leftover cake slices?


Indulge in the delightful world of peanut butter bliss with our Peanut Butter Sheet Cake. Whether you’re celebrating a special occasion or simply craving a sweet treat, this recipe promises to deliver satisfaction in every bite. With the serving tips, storage suggestions, and FAQs provided, you’re well-equipped to master this delicious dessert and share it with friends and family. Get ready to embark on a peanut butter journey that will leave everyone asking for seconds!