Easy peanut butter chocolate sheet cake

Easy peanut butter chocolate sheet cake

This one-bowl, easy peanut butter chocolate sheet cake is just dreamy and would you just look at those swirls of fudgy frosting? I mean.
Course Baking, Cake, Chocolate cake
Cuisine American
Keyword Chocolate cake, chocolate cake recipe, chocolate sheet cake
Prep Time 20 minutes
Cook Time 40 minutes
Cooling time 2 hours
Total Time 3 hours
Servings 12
Calories 628kcal
Author Alida Ryder


for the cake

  • 2 cups cake/all purpose flour
  • 2 cups sugar
  • ½ cup cocoa powder
  • 2 teaspoons baking powder
  • 1 teaspoon salt
  • 1 cup buttermilk
  • 2 eggs
  • ½ cup canola or vegetable oil
  • 1 cup smooth peanut butter
  • 1 cup hot black coffee

for the chocolate peanut butter frosting

  • ½ cup soft butter
  • 2 tablespoons smooth peanut butter
  • 5 cups powdered sugar / icing sugar sifted
  • 3 tablespoons cocoa powder sifted
  • 2 tablespoons cooled coffee
  • 2-3 tablespoons milk
  • 1 cup melted dark chocolate cooled
  • sprinkles to decorate


  • Pre-heat the oven to 180ºc and line a rectangular sheet pan/cake pan with baking paper.
  • In a large bowl, whisk together all the dry ingredients.
  • Add the remaining ingredients and mix at medium speed for 2 minutes until well combined, scraping down halfway to make sure all the ingredients are incorporated.
  • Transfer the batter to the prepared cake pan and place in the oven.
  • Allow to bake for 35-40 minutes or until a skewer inserted comes out clean.
  • Remove from the oven and allow to cool completely before frosting.
  • To make the frosting, beat together the butter and peanut butter.
  • Add the icing sugar, cocoa powder, coffee and milk and beat until thick and smooth.
  • While mixing, slowly pour in the chocolate and allow to mix into the frosting. Mix for a further 1-2 minutes until the frosting is whipped and well combined.
  • Spread the frosting onto the cooled cake and decorate with sprinkles.



Calories: 628kcal | Carbohydrates: 109g | Protein: 12g | Fat: 19g | Saturated Fat: 7g | Cholesterol: 48mg | Sodium: 433mg | Potassium: 414mg | Fiber: 4g | Sugar: 86g | Vitamin A: 290IU | Vitamin C: 1mg | Calcium: 86mg | Iron: 2mg