Peanut Butter Fudge Cake

Peanut Butter Fudge Cake


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


servings 684 cals
Serving size has been adjusted!

Original recipe yields 14 servings



  • Calories:
  • 684 kcal
  • 34%
  • Fat:
  • 35.4 g
  • 54%
  • Carbs:
  • 87.1g
  • 28%
  • Protein:
  • 11.6 g
  • 23%
  • Cholesterol:
  • 80 mg
  • 27%
  • Sodium:
  • 393 mg
  • 16%

Based on a 2,000 calorie diet

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  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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  1. 126 Ratings


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.

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 pea...

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 ...

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 c...

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...

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 "n...

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 ...

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...

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 ...