The Delicious Duo Does it Again in this Impressive Peanut Butter Cup Cake

It really doesn’t get much better than this! Our friends over at Cake-n-Knife have received adoring comments from their fans.


That peanut butter frosting is the stuff dreams are made of.

I could never get tired of peanut butter cups! This is my dream cake!


The best thing about this cake is that it’s really easy to put together!




  • 1 ½ cups all-purpose flour, plus more for pans
  • 1 ½ cups granulated sugar
  • ¾ cup cocoa powder
  • ½ Tbsp baking soda
  • ¾ tsp baking powder
  • 3/4 tsp salt
  • 2 large eggs
  • ¾ cup buttermilk
  • ¼ cup + 1 Tbsp canola oil
  • 1 1/2 tsp vanilla extract
  • 2/3 cup boiling water


  • 2 cups peanut butter
  • 2 cups confectioners’ sugar
  • 8 Tbsp unsalted butter, room temp
  • 1 tsp vanilla extract
  • 1/4 tsp salt
  • Miniature peanut butter cups for decorating (optional)




Preheat oven to 350 degrees. Butter two 9″ round cake pans, dust with extra flour, tapping out excess.

Sift the dry ingredients into the bowl of a mixer. Beat on low-speed until just combined. Increase speed to medium, and add the remaining ingredients, except boiling water. Beat until smooth, approximately 3 minutes. Turn mixer off and carefully add boiling water. Beat on high for approximately 1 minute.

Divide batter evenly between the two pans. Bake for 35 minutes, or until a toothpick inserted in the center of each pan comes out clean. Cool for 15 minutes of a cooling rack, turn cakes out onto the rack and allow to cool completely.

Combine the frosting ingredients in the bowl of a stand mixer fitted with the paddle attachment. Beat until the frosting is light and fluffy, approximately 2 to 3 minutes.

Frost the top of one cake and stack the other cake on top to form two layers. Add a final layer of frosting to the outside and decorate with miniature peanut butter cups if desired.




Thanks to Cake-n-Knife for this delicious cake perfect for any occasion!

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