Peanut Butter Fudge Cake Recipe -
Peanut Butter Fudge Cake Recipe

Peanut Butter Fudge Cake

Recipe by  

"Chocolate cake, chocolate frosting, but with what a difference. Peanut butter is the magic ingredient. It is spread between the cake and the frosting."

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Ingredients Edit and Save

Original recipe makes 1 - 13 x 9 inch sheet cake Change Servings


  1. Combine flour, white sugar, and baking soda in a large mixing bowl; set aside.
  2. Melt 1 cup butter or margarine in a heavy saucepan; stir in 1/2 cup cocoa. Stir in buttermilk, and eggs until well blended. Cook over medium heat, stirring constantly, until mixture boils. Remove from heat. Mix into flour mixture, stirring until smooth. Stir in 1 teaspoon vanilla. Pour batter into a greased and floured 13 x 9 inch baking pan.
  3. Bake at 350 degrees F (175 degrees C) for 20 to 25 minutes, or until an inserted wooden pick comes out clean. Cool 10 minutes on a wire rack. Carefully spread peanut butter over warm cake. Cool completely.
  4. To Make Frosting: Combine 1/2 cup butter or margarine, 1/4 cup cocoa, and buttermilk in a small sauce pan. Bring to a boil over medium heat, stirring constantly. Pour over confectioners' sugar, stirring until smooth. Stir in 1 teaspoon vanilla. Spread chocolate frosting over peanut butter on cake. Cut into squares.
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Reviews More Reviews

Most Helpful Positive Review
Apr 09, 2006

Excellent cake! It is very rich though, so eat in small portions. I found it was easiest to microwave the peanut butter for 30 seconds and then pour in on.

Most Helpful Critical Review
Jun 05, 2007

This recipe was not nearly as wonderful as I thought this would be based other's recipes. My husband thought is was *okay*, but I could have saved a lot of time by making a chocolate cake the "normal" way without all the hoopla this recipe puts you through, open up a can of fudge frosting and mix in some peanut butter and I think I would have gotten much better results. Would not make this cake again.


126 Ratings

Dec 18, 2007

This cake caused arguments in my house. "What do you mean you ate the last piece!?" arguments. It was absolutely dense, rich, and delicious. I did make a few changes. I didn't spread the peanut butter layer alone; I was mixing the icing when we got a call and had to leave the house quickly, when we returned, the icing had hardened in the mixer, so I added the peanut butter directly to it and some light cream to bring it to the right consistency and voila! I will definitely make this cake many, many times, especially when I eat the last piece! Try this, you won't be disappointed.

Aug 31, 2005

Very rich and yummy cake! I love peanut butter and chocolate. I've never made a cake where you first cook the butter, cocoa and eggs together on the stove so that was interesting. When I was cooking the frosting mixture, at the last minute the butter separated out and looked gross and greasy, but mixed fine with the powdered sugar. The chocolate frosting is my favorite part! I used Adam's natural peanut butter, which seemed to go well because the rest of the cake is so sweet. I used a whole 16 oz. jar! I also used a 16 oz. bag of powdered sugar for the frosting. A good use of my buttermilk that was really needing to be used! Try this recipe, it's yummy!

Nov 13, 2004

This is the best cake ever! I have made a recipe identical to this for years! If you add like 1/4 cup of peanut oil to the peanut butter it makes it easier to spread. This is a moist, dense cake that freezes well. You will not be disappointed with this recipe!

Apr 11, 2005

This is a very good chocolate cake. It is more like a sheet cake, and very moist. It is so good with the peanut butter. I added milk chocolate and peanut butter chips to the batter and it was great. I took this to a group get together and everyone loved it. I will make it again for sure!

Feb 19, 2006

This was OK. I really was expecting this to be spectacular from the other reviews I had read. My husband and I thought the frosting was WAY too sweet. Kids liked it, though. There are much better recipes out there for the peanut buttery or fudgey that you crave. Sorry, I won't bother with this recipe again.

Oct 24, 2005

I made this for a friend's birthday and it was a big hit. The peanut butter layer is what makes this cake, and no one could figure out what made it so great. Also mixing the peanut butter with a tablespoon of vegitable oil before spreading on the cake makes all the difference!


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  • Calories
  • 684 kcal
  • 34%
  • Carbohydrates
  • 87.1 g
  • 28%
  • Cholesterol
  • 80 mg
  • 27%
  • Fat
  • 35.4 g
  • 54%
  • Fiber
  • 3.7 g
  • 15%
  • Protein
  • 11.6 g
  • 23%
  • Sodium
  • 393 mg
  • 16%

* Percent Daily Values are based on a 2,000 calorie diet.

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