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

Recipe Summary

Servings:
14
Yield:
1 - 13 x 9 inch sheet cake
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Ingredients

14
Original recipe yields 14 servings
The ingredient list now reflects the servings specified
Ingredient Checklist

Directions

Instructions Checklist
  • Combine flour, white sugar, and baking soda in a large mixing bowl; set aside.

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  • 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.

  • 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.

  • 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.

Nutrition Facts

684 calories; protein 11.6g; carbohydrates 87.1g; fat 35.4g; cholesterol 79.8mg; sodium 393.1mg. Full Nutrition
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Reviews (118)

Read More Reviews

Most helpful positive review

Rating: 5 stars
04/10/2006
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. Read More
(69)

Most helpful critical review

Rating: 2 stars
06/06/2007
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. Read More
(21)
139 Ratings
  • 5 star values: 93
  • 4 star values: 27
  • 3 star values: 9
  • 2 star values: 6
  • 1 star values: 4
Rating: 5 stars
04/09/2006
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. Read More
(69)
Rating: 5 stars
12/18/2007
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. Read More
(59)
Rating: 5 stars
09/01/2005
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! Read More
(51)
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Rating: 5 stars
11/13/2004
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! Read More
(32)
Rating: 5 stars
04/11/2005
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! Read More
(23)
Rating: 5 stars
10/24/2005
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! Read More
(22)
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Rating: 2 stars
06/05/2007
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. Read More
(21)
Rating: 3 stars
02/19/2006
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. Read More
(19)
Rating: 5 stars
05/10/2005
I made this for my mom on Mother's Day. It was wonderful and my mom and grandmother both said it was the best cake they'd ever tasted. I tried to make this into a layer cake, but the icing is so thick and rich, I think it would do better in a 9x13 inch pan. Read More
(19)
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