Chocolate Peanut Butter Fudge takes my Original Fantasy Fudge and gives it the perfect pairing of chocolate and peanut butter. If you love fudge, be sure to try my Peanut Butter Fudge and Salted Caramel Fudge!

Chocolate Peanut Butter Fudge

There is actually a scientific reason that people love the combination of peanut butter and fudge. It’s called Dynamic Sensory Contrast. It has to do with our taste buds loving contrasting textures. But, I don’t need a scientific explanation as to why I love this combination so much. I just do! I can’t say no to candy with this perfect combination. At least I will have a legitimate excuse when I eat my weight in Chocolate Peanut Butter Fudge😊!

Stacked Chocolate Peanut Butter Fudge on a White Plate

Chocolate Peanut Butter Fudge Recipe

I have been making my Original Fantasy Fudge recipe forever, and I am telling the truth about it being a no-fail fudge recipe! Adding some peanut butter to the mix does not keep this Chocolate Peanut Butter Fudge from being a no-fail fudge. It just adds that all-important contrasting flavor of peanut butter.

Ingredients: (full recipe below)

  • Granulated sugar
  • Butter
  • Evaporated milk
  • Semi-sweet chocolate chips
  • Marshmallow fluff
  • Vanilla extract
  • Peanut Butter
  • Confectioners’ sugar
  • Butter

Cut Pieces of Chocolate Peanut Butter Fudge

How to Make Chocolate Peanut Butter Fudge

It’s really easy to make Chocolate Peanut Butter Fudge, and fudge is always nice to have around for a treat to satisfy your sweet tooth. Plus, it’s a great gift to share! One thing that is important is a candy thermometer. I will talk more about that later. Let’s get to how easy this fudge is to make.

  • Line a sheet pan with parchment paper. If you don’t have parchment paper, aluminum foil will also work. Lightly spray the parchment paper or foil with a non-stick spray. This will make it a whole lot easier to remove your fudge from the pan when it’s ready to be cut.
  • In a large saucepan, mix together the sugar, butter, and evaporated milk over medium heat. Be sure to stir it until the sugar is dissolved.
  • Bring the mixture to a full boil for 5 minutes. This is where a candy thermometer comes in handy. If you have one, the temperature should read 234°F.
  • Remove from heat and stir in the chocolate chips until they have melted. Then, beat in the marshmallow fluff and vanilla extract.
  • In a separate bowl, combine the peanut butter, confectioners’ sugar, and melted butter. 
  • Stir in the peanut butter mixture into the fudge. You can swirl the peanut butter into the chocolate as much or as little as you like. The more you stir it in the further down into the chocolate it will get, so feel free to have fun and swirl away if you want to see the peanut butter all throughout.
  • Spread out the fudge onto your lined sheet pan and let it cool for at least 2 hours before cutting.

One piece of Chocolate Peanut Butter Fudge upright In a cut pan

What is a Candy Thermometer?

A candy thermometer, also known as a deep-fry thermometer or sugar thermometer, is used to measure the temperature of a sugar solution. It is definitely an important tool to have when making candy. Just like using a meat thermometer is important for the perfectly cooked meat and measuring cups and spoons are important for measuring ingredients, a candy thermometer has its place in the baking world, for sure! You can find them in most grocery stores and houseware stores. When you use it, just make sure you don’t immerse the thermometer directly into boiling water or let the bulb hit the bottom of the pan. It really is a game-changer, or should I say candy-changer, for your future sugary recipes.

How do you harden Fudge?

Allowing fudge to come to room temperature will solidify it and make it easy to handle. You can also pop it into the refrigerator for a couple of hours or even the freezer for about 30 minutes. Fudge is best consumed at room temperature though, so be sure to take it out a few minutes before you want to eat it. With this fudge specifically, the peanut butter on top might have a creamier consistency than the chocolate, so be prepared for an ooey-gooey, but delicious, experience. 🙂

Common Problems with Fudge and How to Fix Them

When making Old Fashioned Fudge, or any fudge that requires the sugars to reach a certain temperature, a couple of things can go wrong. The fudge could be grainy and never set up properly. But have no fear, your fudge can be saved!

If Your Fudge is Grainy or Too Creamy

This can happen if the fudge is not cooked to a high enough temperature. I have had inaccurate candy thermometers before so I know this can be frustrating when you follow directions to a T. Or, the fudge may have been beaten or stirred for too long. To fix it, scrape the fudge back into a saucepan and add about 1 cup of water. (Anywhere from 1 cup to 1 1/2 cups depending on the recipe you used.) Gently stir the fudge until it reaches 234°. Water can decrease the intensity of flavor, so feel free to add some shaved chocolate over the fudge once it is poured into the prepared baking dish or (with this recipe) top with Reese’s peanut butter cups or another candy. After it reaches the proper temperature, pour it into your prepared pan and follow the directions for cooling. The fudge should be set properly. 

Tips for Perfect Fudge

Make sure your candy thermometer is working properly. You can do this by boiling water and making sure the thermometer reaches 212°F. 

Consider stirring less or not stirring at all while the fudge is bubbling and heating. 

Take your time! Fudge can be super easy or test your patience. 🙂 If it seems to be taking forever to heat to the appropriate temperature don’t give up. It will get there!

Piece of Chocolate Peanut Butter Fudge bit into

How do you store Fudge?

If you are planning on eating it within 2 weeks, you can store the fudge in an airtight container. I like to cut it into pieces and separate the pieces with parchment or wax paper. You can also store fudge in the refrigerator for a few weeks. Again, an airtight container with individual pieces is best. If you need longer storage, like months, the freezer is the best option. I like to tightly wrap the fudge with plastic wrap and then place it in an airtight container or freezer-safe plastic bag. Be sure to write the date on it!

More Fudge Recipes

5 from 3 votes

Chocolate Peanut Butter Fudge

Prep Time 10 mins
Cool 2 hrs
Total Time 2 hrs 10 mins
Chocolate Peanut Butter Fudge Recipe is a no-fail fudge that is loaded with that perfect combination of peanut butter and chocolate.


  • 3 cups (600 g) granulated sugar
  • ¾ cups (170 g) butter
  • cups (168 g) evaporated milk
  • 1 package (12 ounces) semisweet chocolate chips
  • 1 jar (7 ounces) marshmallow fluff
  • 1 teaspoon vanilla extract
  • 1 cup peanut butter
  • 1 cup (125 g) confectioners' sugar
  • ½ cup (113 g / 1 stick) butter, melted


  • Line a 9×13 inch pan with parchment paper.
  • In a large saucepan, over medium heat, mix sugar, butter, and evaporated milk.
  • Bring mixture to a boil, leave on heat until the mixture registers 234°F on a candy thermometer (about 5 minutes), stirring constantly.
  • Remove from heat and stir in chocolate chips until melted and thoroughly combined.
  • Beat in marshmallow fluff and vanilla extract.
  • In a separate bowl, combine the peanut butter, confectioners' sugar, and melted butter.
  • Swirl the peanut butter mixture into the fudge.
  • Transfer fudge to the prepared pan and let it cool about 2 hours before cutting.

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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. If you don’t have a candy thermometer, just use a glass of ice cold water and periodically check your mixture by dropping a small amount in. If it forms a soft ball, you’re at soft ball stage, ~234 F, which is the goal for fudge.

  2. Is the peanut butter mix supposed to be runny?? I tried making this and it was super runny and that part didn’t want to set up. I did accidentally overcook the fudge part. So the whole thing was a fail BUT it all still tasted really good! Just want to make sure about the peanut butter part before I try making it again. Thanks for sharing the recipe!

  3. Fudge did not set up. The peanut butter part was runny and had an unappetizing greasy appearance on top of the fudge..

    1. Hi Novice Baker! (Amy) There is an entire section in the post about what to do should that happen. I troubleshoot any issues and walk you through how to fix them. Hope that helps!

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