Irresistible Peanut Butter Sheet Cake with Peanut Butter Frosting



Indulge your sweet tooth and delight your taste buds with our Peanut Butter Sheet Cake with Peanut Butter Frosting recipe. This decadent dessert is a celebration of all things peanut butter, featuring a moist and tender cake topped with creamy peanut butter frosting. Whether you’re hosting a gathering, celebrating a special occasion, or simply treating yourself to a well-deserved treat, this sheet cake is sure to be a hit. Let’s dive into the world of peanut buttery goodness and create a dessert that’s bound to become a new favorite!

video instructions available below 👇 


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, lightly beaten
– 1/2 cup buttermilk
– 1 teaspoon vanilla extract

For the Peanut Butter Frosting:
– 1/2 cup unsalted butter, softened
– 1 cup creamy peanut butter
– 2 cups powdered sugar
– 1 teaspoon vanilla extract
– 2-4 tablespoons milk or cream (as needed for consistency)


1. Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan or line it with parchment paper for easy removal.

2. Prepare the Cake Batter:
– In a large mixing bowl, combine the flour, sugar, baking soda, and salt.
– In a saucepan, melt the butter over medium heat. Stir in the water and bring the mixture to a boil.
– Remove the saucepan from the heat and stir in the creamy peanut butter until smooth.
– Pour the peanut butter mixture over the dry ingredients in the mixing bowl and mix until well combined.
– Stir in the lightly beaten eggs, buttermilk, and vanilla extract until the batter is smooth and evenly mixed.

3. Bake the Cake:
– Pour the batter into the prepared baking pan and spread it out evenly.
– Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center of the cake comes out clean.
– Remove the cake from the oven and let it cool completely in the pan on a wire rack.

4. Make the Peanut Butter Frosting:
– In a large mixing bowl, beat together the softened butter and creamy peanut butter until smooth and creamy.
– Gradually add the powdered sugar, beating well after each addition, until the frosting is smooth and fluffy.
– Stir in the vanilla extract.
– If the frosting is too thick, gradually add milk or cream, a tablespoon at a time, until you reach your desired consistency.

5. Frost the Cake:
– Once the cake has cooled completely, spread the peanut butter frosting evenly over the top of the cake.
– Use an offset spatula or the back of a spoon to smooth the frosting into an even layer.

6. Serve and Enjoy:
– Cut the peanut butter sheet cake into squares and serve it as is, or garnish with chopped peanuts or chocolate chips for extra flair.
– Serve slices of this indulgent cake alongside a glass of cold milk or a scoop of vanilla ice cream for the ultimate dessert experience.


With its rich peanut butter flavor and creamy frosting, our Peanut Butter Sheet Cake with Peanut Butter Frosting is a dessert lover’s dream come true. Whether you’re craving a sweet treat for a special occasion or simply indulging in a moment of pure bliss, this cake delivers satisfaction in every bite. So gather your ingredients, preheat your oven, and get ready to bake up a batch of pure peanut butter perfection. Your taste buds will thank you for this delightful indulgence!

The Ultimate Peanut Butter Sheet Cake

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