Peanut Butter Chocolate S'mores Fudge Cake

Total Time
Prep 30 mins
Cook 30 mins

I had this at my parents house today. My Daddy made it and we all loved it. If you love peanut butter and chocolate, You WILL love this!!! Great for Church socials and other gatherings. ***Note*** Wherever you see "(*optional)", that is where my Daddy added that little something extra into the original recipe. I hope you try it and like it!

Ingredients Nutrition


  1. Preheat oven to 350 degrees. Grease and flour a 9-by-13-inch pan.
  2. Combine sugar, flour, baking soda and "optional" pudding mix in bowl.
  3. In a saucepan over medium heat, bring butter, vanilla, cocoa, water, buttermilk and eggs to a rolling boil, stirring occasionally.
  4. Pour over dry ingredients and mix well.
  5. Bake 25 minutes, until center bounces back when lightly touched.
  6. Cool cake completely. Combine peanut butter and peanut oil in bowl and spread over cake. Sprinkle with marshmallows.
  7. Prepare Chocolate Fudge Frosting:In a saucepan over medium heat combine butter cocoa buttermilk vanilla and *optional Karo. Bring to a boil, stirring constantly. Remove from heat and stir in confectioners' sugar. Stir or whisk until smooth. While still warm, pour over evenly over marshmallows.
  8. Allow frosting to set 5-10 minutes before serving.
Most Helpful

5 5

This is a decadently rich yummy cake & I used all the optional choices. You're only able to eat a tiny bit so it's great for a crowd. Just make sure you have milk in the house because you'll need it after eating a slice of this baby. I made homemade marshmallows (Alton Brown's recipe) & used them & it was a nice touch. Will truly make this one again -thanks for such a lovely recipe.

5 5

This is to die for!! This is awesome! I did all the optional things and it came out wonderfully. With the third step, the eggs started to cook, so I had to take it off the stove but the cake was fine. I also just put the peanut butter in the micro for about 30 seconds and poured on and didn't use the oil. The frosting I also had to add a little extra milk for the frosting to be pourable. Everyone needs to try this if they love peanut butter and chocolate!! Thanks, Chef Mommie! This recipe made it into our book#179809!

3 5

Not bad, but I think I'm spoiled from having the classic Rocky Road Fudge bars, which are brownies with S'more toppings instead of cake. I found myself wanting the base to be more dense and less cakey. Love the layer of peanut butter and followed another reviewer's advice to just nuke it into spreading consistency (who wants to my peanut oil just for one recipe?). FYI, substitution for buttermilk: put 1/2 Tblsp of cider vinegar or lemon juice in 1/2 cup measuring cup and add enough milk to fill the cup.. For the 6 tablespoons of buttermilk, I added 1 tsp of cider vinegar to 1/3 cup and added the milk... then dolloped in just a little extra since 1/3 cup is a little short.