Such a fun treat today! This Peanut Butter Cake with Chocolate Frosting is such a wonderful combination of chocolate and peanut butter. Rich frosting paired with a moist cake is a delight to the senses!

Peanut Butter Cake

There is nothing worse than a dry peanut butter cake and I have tested enough recipes to know that making a soft, moist peanut butter cake is not as easy as it sounds. This recipe is one that always works and always shines with amazing peanut butter flavor and the soft crumb that people demand.


Peanut Butter Cake on Cake Stand

Peanut Butter Cake with Chocolate Frosting

Is there any better flavor combination than Chocolate and Peanut Butter? I think it has stood the test of time for a reason… it IS the best! Making this cake was a delight from beginning to end and the second this cake came out of the oven I knew I was in love.  It was pure bliss.
Peanut Butter Frosting on Peanut Butter Cake on Wooden Cake Stand


For the top, I went to my go-to method for decorating a cake and that is the Ateco 846 tip.

I put 1/2 cup peanut butter, 1/4 cup butter softened, 1 cup confectioners sugar, and 1-3 tablespoons of milk in the mixer and blended to a nice creamy consistency.  (add more or less milk to reach your desired consistency)

Then simply just piped out little piles of peanut butter frosting bliss and covered in chocolate sprinkles.

Easy Peanut Butter Cake on a White Plate Showing Inside Texture

Peanut Butter Cake with Dark Chocolate Frosting
2.67 from 6 votes

Peanut Butter Cake with Chocolate Frosting

Prep Time 25 minutes
Cook Time 25 minutes
Total Time 50 minutes
Is there any better flavor combination than Chocolate and Peanut Butter? I think it has stood the test of time for a reason… it IS the best!



  • cups all-purpose flour
  • 1 teaspoon baking powder
  • ¼ teaspoon salt
  • cup creamy peanut butter
  • ½ cup (113g) butter, softened to room temperature
  • ¾ cup dark brown sugar
  • 3 large eggs, room temperature
  • 1 teaspoon good quality vanilla extract
  • ¼ cup milk

Dark Chocolate Frosting

  • cups confectioners' sugar
  • cup unsweetened cocoa powder
  • 6 tablespoons unsalted butter, softened to room temperature
  • 6 tablespoons heavy cream
  • 1 teaspoon vanilla extract


  • Preheat oven to 350°F. Prepare an 8 inch round cake pan.


  • Mix together the flour, baking powder, and salt. Set aside.
  • Cream together the peanut butter, butter, and brown sugar until light and fluffy; about 2 minutes on medium speed.
  • With mixer on slow, beat in eggs and vanilla. Scrape down the sides as needed.
  • Slowly beat in the flour mixture alternately with the milk, mixing until just combined.
  • Do not overmix. Batter will be thick.
  • Bake for 32-35 minutes or until toothpick inserted in the middle of a cake comes out clean. Allow cake to cool before frosting.


  • Sift together the powdered sugar and cocoa powder to assure there are no lumps. Set aside.
  • With a stand mixer, beat the butter at medium speed until fluffy - about 2 minutes.
  • With mixer on low, gradually add the sifted sugar/cocoa powder alternately with the heavy cream and vanilla.
  • Add more powdered sugar if frosting is too dark. Add a pinch of salt if frosting is too sweet.

Did you make this recipe?

Thank you for making my recipe! You took pictures, right? Well go ahead and post them on Instagram! Be sure to mention me @iambaker and use the hashtag #YouAreBaker.

Some folks mentioned in the comment that their cake was dry. This is a HUGE no-no in baking and I remade the recipe (in the middle of December in Minnesota) just to see if I could replicate their results. I didn’t find the cake to be dry per say, but it was not as moist as when I first tested this recipe in 2014. I recommend adding an additional egg. When I tested the recipe with 3 LARGE eggs instead of 2, it was just as moist and scrumptious as the first time. I will test one more time to make sure it’s the best before switching the recipe! 

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Meet Amanda Rettke

Amanda Rettke is the creator of I Am Baker, and the bestselling author of Surprise Inside Cakes: Amazing Cakes for Every Occasion – With a Little Something Extra Inside.Over the course of her 15+ year blogging adventure, she has been featured in and collaborated with the Food Network, New York Times, LA Times, Country Living Magazine, People Magazine, Epicurious, Brides, Romantic Homes, life:beautiful, Publishers Weekly, The Daily Mail, Star Tribune, The Globe and Mail, DailyCandy, YumSugar, The Knot, The Kitchn, and Parade, to name a few.

Reader Comments

    1. Unfortunately, this problem won’t be fixed in Dec. 27th. I literally have involved my lawyer and am trying to get this resolved, but my ad company refuses to help.

  1. I just made the Peanut Butter Cake with the Choc. frosting and was very disappointed. The frosting was very thick even after adding an extra Tablespoon of heavy cream and was too sweet. The cake was very heavy. My husband has a sweet tooth and he did not like it….Cannot not eat another piece.

  2. I had trouble with it being dry as well. I switched out the butter for oil and traded my simple peanut butter for a regular national brand. That fixed it. I’ve had this trouble with other cake that call for butter and not oil. Oil does the trick.

  3. Hi. husband’s birthday is on Valentine’s Day and he loves pB and chocolate. I would like to make this but so many comments about dryness. 2 eggs or 3 to make it scrumptious? Need a sure thing lol.

  4. You certainly have some awesome recipes!! I’m saving some of them to bake later. The peanut cake with chocolate sounds divinely delicious!!
    Thanks for sharing
    Kathy Digby

  5. This cake is like a giant peanut butter cookie. My family loves peanut butter & chocolate, so this cake is perfect for my daughters’ birthday party! Easy to make but I used my favorite frosting , which used baking chocolate instead. This is a keeper! Thanks Amanda for your recipe. By the way, that’s my other daughters’ name!

  6. Sounds good but you adding a little oil like maybe a tbsp to combat dryness might work better than adding an egg.

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