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Easiest Peanut Butter Fudge

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5 from 70 votes

You’re 4 ingredients away from creamy, extra peanut buttery fudge! This peanut butter fudge comes out smooth and creamy with less than 10 minutes of prep, using the microwave. It’s that easy!

If you’re a peanut butter lover like me, this easy peanut butter fudge will be your go-to dessert. Plus it keeps well in the fridge for weeks – and freezes for months! Fudge yeah!

Peanut butter crazed? Try my Peanut Butter Pie or my 5-ingredient Peanut Butter Chocolate Chip Cookies too.

Recipe for Peanut Butter Fudge…In the Microwave!

This fudge recipe couldn’t be easier or more peanut buttery. I use less sugar than most recipes, which yields a more intense peanut buttery flavor and soft, creamy texture. It’s heavenly! Why will you love this peanut butter fudge? Here are my top reasons!

  1. Extra peanut buttery flavor!
  2. Creamy and soft (never gritty)
  3. Only 4 ingredients
  4. Fool-proof, 10-minute microwave fudge recipe
  5. Tons of mix-in and topping ideas

Ingredients Needed

  • Smooth peanut butter – regular, smooth peanut butter is the best option for making this fudge! Stay away from natural peanut butter.
  • Confectioner’s sugar – confectioner’s sugar (AKA powdered sugar) is the base for fudge! I use less confectioner’s sugar than most peanut butter fudge recipes. You end up with a rich peanut buttery taste and soft, creamy fudge.
  • Salted butter – I use salted butter so you don’t need to add salt too. You can add in ½ teaspoon salt if you’re using unsalted butter.
  • Vanilla extract – vanilla extract adds flavor.
Easy peanut butter fudge ingredients

How to Make Peanut Butter Fudge

Learn how to make easy peanut butter fudge in a few easy steps. Full instructions in the recipe card; this is just an outline!

  1. Prepare.

    Grease or line an 8×8” baking dish with parchment paper.

  2. Make.

    Melt butter and peanut butter in the microwave, until butter is just melted. Add vanilla and stir until uniform. Add sugar and stir until smooth. If there are lumps, microwave mixture in increments of 15 seconds, stirring vigorously every increment, until lumps dissolve.

  3. Set.

    Pour into prepared pan. Refrigerate for about 2 ½ hours, until set. Slice.
    Refrigerate fudge and then slice.

Watch the Recipe Video

    Recipe Notes

    • Stay away from natural peanut butter. 
    • If you don’t have a sifter, you can simple add in unsifted sugar and work the lumps out by heating the mixture according to the steps above.
    • If you’d like to make a pretty design on top of your fudge, refrigerate the prepared pan of fudge for a few minutes until it just starts to set. Then use a spatula to make a pretty swirl design, and place your fudge back in the fridge to finish setting!
    • Run a knife under hot water to slice peanut butter fudge with ease.
    • If you like your peanut butter fudge soft, enjoy at room temperature. If you like your peanut butter fudge more dense, enjoy chilled.
    • Variations? Add in 3/4 to 1 cup of peanut butter cups, M&Ms, crushed Butterfingers, Oreos, pretzels, brownies, etc! Or swirl in melted chocolate chips…yum.

    FAQs

    How do I store peanut butter fudge?

    Fudge keeps well at room temperature for about a week, or in the fridge for 2-3 weeks!

    Can you freeze it?

    Yes absolutely! Freeze the peanut butter fudge in a freezer-safe container for up to 3 months. Thaw in the fridge overnight for best results.

    Why is my peanut butter fudge lumpy?

    Make sure the sugar completely dissolves into the butter and peanut butter mixture. If there are lumps, microwave mixture in increments of 15 seconds, stirring vigorously every increment, until lumps dissolve.

    More Peanut Butter Recipes You’ll Love!

    Easiest Peanut Butter Fudge

    You’re 4 ingredients away from creamy, extra peanut buttery fudge! This peanut butter fudge comes out smooth and creamy with less than 10 minutes of prep, using the microwave. It's that easy!
    5 from 70 votes
    Prep Time: 10 minutes
    Refrigeration Time: 2 hours 30 minutes
    Total Time: 2 hours 40 minutes
    Course: Dessert
    Cuisine: American, New England
    Keyword: any season, fall, winter
    Servings: 36 small pieces
    Calories: 121kcal
    Author: Tastefully Grace

    Equipment

    • 8×8" baking pan (you can also use a 9×9" pan if needed)

    Ingredients

    • 1 cup smooth peanut butter
    • 2 ½ cups confectioner’s sugar sifting recommended
    • 1 cup salted butter (2 sticks)
    • 2 teaspoons vanilla extract

    Instructions

    • Grease or line an 8×8” baking pan with parchment paper (so you can easily lift the fudge out of the pan).
    • Melt butter and peanut butter in the microwave, until butter is just melted. Add vanilla and stir until uniform. Add sugar and stir until smooth. If there are lumps, microwave mixture in increments of 15 seconds, stirring vigorously every increment, until lumps dissolve.
    • Pour and spread evenly in prepared pan. Refrigerate for about 2 ½ hours, until set. Slice.

    Video

    Notes

    • Stay away from natural peanut butter. Use regular smooth peanut butter.
    • If you’re using unsalted butter, add in ½ teaspoon salt.
    • If you don’t have a sifter, you can simple add in unsifted sugar and work the lumps out by heating the mixture according to the steps above.
    • If you’d like to make a pretty design on top of your fudge, refrigerate the prepared pan of fudge for a few minutes until it just starts to set. Then use a spatula to make a pretty swirl design, and place your fudge back in the fridge to finish setting!
    • Run a knife under hot water to slice fudge with ease.
    • Fudge keeps well at room temperature for about a 1 week, in the fridge for 2-3 weeks, and in the freezer for 3 months.
    • If you like your fudge soft, enjoy at room temperature. If you like your fudge more dense, enjoy chilled.

    Nutrition

    Serving: 1piece | Calories: 121kcal | Carbohydrates: 10g | Protein: 2g | Fat: 9g | Saturated Fat: 4g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.2g | Cholesterol: 14mg | Sodium: 71mg | Potassium: 42mg | Fiber: 0.3g | Sugar: 9g | Vitamin A: 158IU | Calcium: 5mg | Iron: 0.1mg
    Tried this recipe?Let us know how it was!
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    32 Comments

    1. Jean Gray
      December 19, 2023 / 6:56 pm

      5 stars
      I made fudge for the first time! Thank you. Fudge I am given is always too sweet and not peanut buttery enough. This was sooo perfect. I am making another batch tomorrow.

      • December 20, 2023 / 9:48 am

        Hi Jean,

        I totally agree with you! My goal was to make extra peanut buttery fudge 🙂 I’m so glad you love it as much as I do! Happy Holidays.

        Grace

    2. Cindy
      December 19, 2023 / 12:04 pm

      5 stars
      I love this recipe, it’s easy, simple and delicious. I gave my neighbors some and now at least once a week I have one or more of my neighbors come to me with peanut butter, powder sugar and the other ingredients and ask if I can make my delicious peanut butter fudge. It’s a big hit in my neighborhood, I don’t mind making it for them cuz I get more fudge that way. Delicious Delicious Delicious can’t wait to make it at Christmas time and give it out as gifts to friends and family

      • December 19, 2023 / 2:33 pm

        Hi Cindy,

        Your review made me so happy! Thanks so much for letting me know. Merry Christmas!

        Grace

    3. Lydia
      December 6, 2023 / 6:46 pm

      So easy to make! I have a question! Instead of adding melted chocolate chips could I just use cocoa powder and if yes, how much?

      • December 6, 2023 / 6:53 pm

        Hi Lydia,

        Hmmm, I’ve never thought of that! I’d imagine you can use cocoa powder! Sprinkle the cocoa powder over the surface of the peanut butter fudge. Use a toothpick, skewer, or knife to create swirls by gently dragging it through the cocoa powder and peanut butter fudge mixture. This will create a marbled effect. I’d start with 1/4 cup and if you want more, keep increasing a tablespoon at a time.

        I hope this helps!
        Grace

        • Lydia
          December 6, 2023 / 7:49 pm

          5 stars
          Thank you! I won’t do the marble effect but I will stir it in that way the taste of the cocoa powder isn’t bitter just sitting on top. I’ll let you know how it turns out! Thanks for your recommendation! Merry Christmas! 🎄

          • December 6, 2023 / 8:43 pm

            Mixed in, I warn you that the texture of the fudge might change! I just don’t want to lead you on and then have the fudge not set correctly. If you try it, let me know how it goes! Merry Christmas to you as well 🙂

            Grace

    4. Jammie Cody
      November 7, 2023 / 10:26 am

      5 stars
      Super simple and absolutely delicious! My honey loves anything peanut butter and said this is the best peanut butter fudge he’s ever tasted!!!!

      • November 7, 2023 / 12:55 pm

        Hi Jammie,

        Amazing!!! So happy you both loved it! Thanks so much for letting me know.

        Grace

    5. Hanna Morgan
      October 6, 2023 / 8:23 am

      So peanut buttery and AMAZING. Easy to follow instructions.

      • October 6, 2023 / 8:24 am

        Hanna,

        Woohoo! It’s the best, isn’t it?

        Grace

    6. Georgia
      October 6, 2023 / 8:23 am

      5 stars
      Easiest and best fudge I’ve ever had!

    7. Michelle
      October 6, 2023 / 6:22 am

      5 stars
      This fudge tastes amazing!!! But for some reason, mine never set up despite following the directions. Any suggestions or recommendations? Thanks!

      • October 6, 2023 / 8:22 am

        Hi Michelle,

        Ahh that’s so odd! I’m trying to think why this could be. Honestly the only thing I can think of is if your PB was oily (like a natural peanut butter) or if all ingredients were mixed at once? To fix, it’s difficult to say (how liquidy is it?). If it’s close to set but not quite there, I recommend keeping it in the fridge for an hour or 2 longer, or even try popping in the freezer for a bit! Otherwise, it might be better to start over with a different PB (like a standard Jif). Feel free to send me a pic to my email TastefullyGrace@gmail.com and I can try to help troubleshoot!

        Grace

        • Michelle
          October 8, 2023 / 2:32 pm

          Thanks for your response! I did you JIF peanut butter, but it was a tad more oily than normal, so that probably is why! The consistency was similar to a really soft putty, like I could cut it at all, just scoop it with a spoon. Luckily, setting it in the freezer did firm it right up. It’s absolutely delicious!

          Thanks again!
          Michelle

          • October 10, 2023 / 8:28 am

            Hi Michelle,

            SO glad the freezer helped. Phew! Thanks so much for reaching out and your review!

            Grace

    8. Tom
      September 26, 2023 / 3:21 pm

      Haaa thought you might be interested in hearing I recently had to take over 90% of the household chores since my wife had her stroke. one of the things I’ve found fun is cooking for us. Bought rather nasty peanut butter4 we didn’t like but instead of throwing it out decided to try and make fudge. Haaa found this recipe which was right up my alley as I don’t like long difficult preparation ones. I have made 3 batches of this and each time I’ve played with the recipe a little just checking out different spices. A little nutmeg in one and this one today a little pumpkin pie spice. Oh my goodness!! I share with my neighbors as they help me out a lot. So when I’m making things I always make an extra for them. Shepards pie, meat loaf things like that.

      All that to say thanks for the easy but wonderful recipe!!!

      • September 27, 2023 / 9:06 am

        Hi Tom,

        I love the different flavor combinations you came up with! Thanks so much for sharing your story. I’m so glad you like the fudge. If you try any other recipes, please let me know!

        Grace

    9. Tessa
      July 24, 2023 / 12:04 pm

      5 stars
      Thank you for this perfectly simple and absolutely delicious recipe! It’s a new household favorite treat that I make frequently instead of buying candy for the candy jar lol Detailed, accurate, wonderful recipe!

      • July 24, 2023 / 12:10 pm

        Hi Tessa,

        Thanks for your comment. I’m so glad you love this recipe as much as I do!

        Grace

    10. Denise M.
      January 7, 2023 / 9:03 am

      5 stars
      So delicious. My guy’s new favorite ask! I’ve made it twice in two weeks. 🙂

      • January 9, 2023 / 8:51 am

        That’s what I love to hear! Thanks for commenting!

        Grace

    11. Kopees
      December 26, 2022 / 9:29 am

      5 stars
      If I could give it more stars, I would!
      This is the best peanut butter fudge I’ve ever had, hands down!!!

    12. Dawn Holmstrom
      December 24, 2022 / 5:30 pm

      5 stars
      I really loved this one. My family now wants me to make fudge all the time.

    13. Anonymous
      December 21, 2022 / 8:04 pm

      5 stars
      Thank you this peanut butter fudge recipe is the best I’ve ever had

      • December 21, 2022 / 9:20 pm

        This makes me so happy! Thanks for the comment 🙂

        Grace

        • Dawn Holmstrom
          January 10, 2023 / 5:55 pm

          I finally found out that you have microwave fudge. This an awesome recipe and now I can’t stop making microwave fudge.

          • January 10, 2023 / 6:57 pm

            SO happy to hear! Thanks for commenting 🙂

            Grace

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