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A chocolate sheet cake covered in peanut butter frosting with pieces cut off.

One Bowl Chocolate Sheet Cake with Creamy Peanut Butter Frosting

Teri & Jenny
One Bowl Chocolate Sheet Cake with Creamy Peanut Butter Frosting. The perfectly easy and delicious birthday cake or for any special occasion!
5 from 3 votes
Prep Time 15 mins
Cook Time 40 mins
Total Time 55 mins
Course Dessert
Cuisine American
Servings 15
Calories 418 kcal


chocolate cake

  • 2 cups all-purpose flour
  • 2 cups sugar
  • ¾ cup unsweetened cocoa powder
  • 2 teaspoons baking soda
  • 1 teaspoon baking powder
  • ½ teaspoon salt
  • 2 large eggs
  • 1 cup buttermilk
  • 1 cup hot water
  • 1 cup vegetable oil
  • 1 teaspoon vanilla extract or paste

fluffy peanut butter frosting

  • 1/2 cup (1 stick) unsalted butter, softened
  • 1/2 cup creamy peanut butter
  • 2 cups sifted powdered sugar
  • 1 teaspoon vanilla extract
  • ½ teaspoon salt
  • 3 tablespoons heavy cream
  • 1/2 cup dark chocolate shavings, for decorating


  • Chocolate cake: Preheat oven to 350˚F. Lightly grease a 9”x 13” baking dish and set aside.
  • In a large mixing bowl whisk together flour, sugar, cocoa powder, baking soda, baking powder, and salt.
  • Add eggs, buttermilk, water, oil, and extract (or paste) and whisk together until thick, even batter has formed.
  • Pour batter into prepared baking dish and bake for 35 to 40 minutes or until a toothpick comes out clean when inserted into the center of cake.
  • Allow cake to cool enough to handle, then transfer cake to a cooling rack and cool completely.
  • Frosting: Place butter and peanut butter into a mixing bowl and beat together with a hand mixer, until light and fluffy. Scrape down sides of bowl and add ½ cup sugar at a time until all sugar has been incorporated. Add vanilla, salt and heavy cream and continue to beat frosting until light and fluffy.
  • Assemble: Evenly spread frosting over sheet cake and top with shaved chocolate. Slice and serve.


  • *Makes 1 (9”x13”) sheet cake


Calories: 418kcalCarbohydrates: 63gProtein: 7gFat: 17gSaturated Fat: 9gCholesterol: 44mgSodium: 399mgPotassium: 211mgFiber: 3gSugar: 45gVitamin A: 291IUCalcium: 57mgIron: 2mg
Keyword cake, chocolate, peanut butter frosting
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