Peanut Butter Sheet Cake with Peanut Butter Frosting

Indulge in the ultimate peanut butter lover’s dream with this rich and moist Peanut Butter Sheet Cake with Peanut Butter Frosting. This crowd-pleasing dessert pairs a tender, flavorful cake infused with creamy peanut butter and a hint of vanilla with a luscious, melt-in-your-mouth peanut butter frosting that’s perfectly sweet and velvety. Ready in just 40 minutes, this easy sheet cake recipe is perfect for birthdays, potlucks, or any occasion that calls for a comforting homemade treat. The combination of buttermilk in the batter and a warm frosting spread over the cake creates a melt-in-your-mouth texture that’s simply irresistible. Whether served as a casual dessert or the star of your dessert table, this peanut butter sheet cake is guaranteed to be a hit!

Nutriscore Rating: 42/100

Prep Time:20 mins

Cook Time:20 mins

Total Time:40 mins

Servings: 16

Ingredients

• 2 cups All-purpose flour
• 2 cups Granulated sugar
• 1 teaspoon Baking soda
• 0.5 teaspoons Salt
• 1 cup Unsalted butter
• 0.5 cups Creamy peanut butter
• 1 cup Water
• 0.5 cups Buttermilk
• 2 Large eggs
• 1 teaspoon Vanilla extract
• 4 cups Powdered sugar (for frosting)
• 0.5 cups Creamy peanut butter (for frosting)
• 0.25 cup Unsalted butter (for frosting)
• 0.25 cups Milk (for frosting)
• 1 teaspoon Vanilla extract (for frosting)

Directions

Step 1

Preheat the oven to 350°F (175°C). Grease and flour a 9x13-inch sheet pan.

Step 2

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

Step 3

In a medium saucepan over medium heat, melt the butter and peanut butter together. Stir in the water and bring to a gentle boil, then remove from heat.

Step 4

Pour the warm peanut butter mixture into the dry ingredients and stir until partially combined.

Step 5

In a separate small bowl, whisk together the buttermilk, eggs, and vanilla extract.

Step 6

Add the wet mixture into the batter and mix until completely smooth and combined.

Step 7

Pour the batter into the prepared sheet pan, spreading it out evenly.

Step 8

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

Step 9

While the cake bakes, prepare the frosting. In a medium saucepan over low heat, melt the butter and peanut butter for the frosting, stirring until smooth.

Step 10

Remove the mixture from heat and whisk in the milk and vanilla extract.

Step 11

Gradually stir in the powdered sugar until the frosting is smooth and spreadable.

Step 12

Once the cake has baked, remove it from the oven and let it cool for about 10 minutes.

Step 13

Spread the peanut butter frosting over the warm cake evenly.

Step 14

Let the cake cool completely before slicing and serving.

Nutrition Facts

Serving size	(2089.0g)

Amount per serving	% Daily Value*
Calories	7271.5

Total Fat 281.1g	0%
Saturated Fat 115.2g	0%
Polyunsaturated Fat 0.2g
Cholesterol 767.6mg	0%
Sodium 3817.7mg	0%
Total Carbohydrate 1151.2g	0%
Dietary Fiber 21.5g	0%
Total Sugars 932.9g
Protein 100.0g	0%

Vitamin D 203.6IU	0%
Calcium 511.0mg	0%
Iron 18.2mg	0%
Potassium 2205.6mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 33.6%

Protein: 5.3%

Carbs: 61.1%