This old fashioned peanut butter fudge recipe is truly decadent. This is the best recipe if you're short for time in the kitchen and still want a delicious dessert with a rich and creamy peanut butter flavor. We only use four ingredients and everything comes together in 10 minutes!
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It seems as though life has been so busy lately... you can relate, right? When things are busy, I always default to my quick and easy desserts. I love making oatmeal applesauce muffins for a quick breakfast, or soft pumpkin cookies for an indulgent treat. When I need an easy homemade gift for the holidays this microwave fudge recipe is my go-to!
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Why you'll love this recipe
Level of Difficulty: Traditional fudge needs skill, precision, and a candy thermometer. If you're looking for a simple, fail-safe recipe, try this old fashioned peanut butter fudge recipe. I almost feel guilty sharing this recipe with you, it's just that simple! The hardest thing you do will be waiting 2 hours for it to harden in the refrigerator.
Taste & Texture: These little squares of fudge literally melt in your mouth! They have a distinctly creamy peanut butter flavor to them, which tempers some of the sweetness. They're a delicious treat that reminds me of the homemade candy of my childhood.
Key ingredients and why we use them
- Peanut Butter: Since this recipe is so simple, make sure you are using quality ingredients. Peanut butter is the star of this recipe, so make sure you chose a brand that you really like. I'm a fan of making my own peanut butter and then using it in this recipe.
- Butter: A quality brand of butter gives this recipe it's indulgent and smooth texture. My favorite brands of butter are Grassland, Fall Creek, Lurpak, and Plugra.
- Confectioner's Sugar: These treats are loaded with sweetness and it all comes from the confectioner's sugar. Make sure you sift your sugar in advance to remove any lumps!
- Vanilla Extract: Just a dash of vanilla extract pulls everything together in this recipe. I had originally published this without the vanilla extract, but I think it adds a nice touch. Consider these substitutes if you don't have some on hand.
Frequently asked questions
How do I measure peanut butter?
Measuring peanut butter can quickly turn into a gooey mess as you try to scrape everything out of the measuring cup without leaving anything behind. To make this process easier, spray your measuring cup with cooking spray before adding the peanut butter. Then when you're finished, it should slide out of the cup with no mess at all!
What bowl should I use in the microwave?
Glass and ceramic are usually your best bet for microwave use. Some plastics can be used in the microwave but be sure you look for the "heat proof" or "microwave safe" label on the bottom. Regardless of what you use, remember that your dish will always be HOT! Be sure you use potholders when removing your dish from the microwave.
HEATHER'S HELPFUL HINT
Before slicing your fudge, run your knife under hot water for 15 seconds. This will warm up the blade and allow you to cut through the bars with ease! Repeat as necessary while slicing your bars.
Step by step: How to make peanut butter fudge
1. Mix together the butter and peanut butter in a medium microwave-safe bowl.
2. Cover with plastic wrap and poke a few holes for the steam to vent. Microwave on high for 2 minutes. Remove bowl from microwave and stir. Return and microwave for 2 more minutes.
3. Using a wooden spoon or large rubber spatula, mix in the vanilla and then add the sifted confectioners' sugar. The mixture will become crumbly and hard and lose its sheen.
4. Press the fudge into your prepared 8-inch pan. Smooth the top with a spatula or the back of a spoon. The top will have an oily sheen. Cover tightly with aluminum foil and refrigerate until cool-about 2 hours.
5. Once cooled, use a warm, sharp knife to cut the fudge into squares. Wipe down the knife if the fudge accumulates while you are cutting.
Make-ahead and storage tips
- You can make your fudge 1-2 days in advance and then leave it tightly covered in the refrigerator. When you're ready to serve, simply take it out and cut it into squares.
- Store your fudge in an airtight container in the refrigerator for up to a week.
- You can also freeze your fudge. Just make sure to wrap it in plastic and store it in a freezer bag. I sometimes make a batch of this for holiday gifts a month in advance and then store it in the freezer. It's a great way to save some time around the holidays!
Recipe variations
There are a number of different ways to switch up this recipe according to your taste!
- You could shape the fudge mixture into balls and then dip them in melted chocolate for a bite-sized chocolate treat!
- Any type of chocolate add-in would be a delicious addition to this recipe. I'm thinking of miniature Reese's peanut butter cups or roughly chopped Snickers bars... YUM!
- If you're looking for a different flavor combination, I really like this white chocolate fudge recipe that uses white chocolate chips and condensed milk!
Enjoy some more candy recipes
Our recipe index is a great place to search all My Sweet Precision recipes!
Recipe
Old Fashioned Peanut Butter Fudge
Equipment
- 8-inch square pan
Ingredients
- 1 cup unsalted butter
- 1 cup smooth peanut butter
- 3¾ cup confectioners' sugar sifted
- 1 teaspoon vanilla extract
Instructions
- Line an 8-inch baking pan with parchment paper, leaving an overhang on the edges for easy removal later. Spray the pan with baking spray and set it aside.
- Mix together the butter and peanut butter in a medium microwave-safe bowl. Cover with plastic wrap and poke a few holes for the steam to vent. Microwave on high for 2 minutes. Remove bowl from microwave and stir. Return and microwave for 2 more minutes.
- Using a wooden spoon or large rubber spatula, mix in the vanilla and then add the sifted confectioners' sugar. The mixture will become crumbly and hard and lose its sheen.
- Press the fudge into your prepared 8-inch pan. Smooth the top with a spatula or the back of a spoon. Cover tightly with aluminum foil and refrigerate until cool-about 2 hours.
- Once cooled, use a warm, sharp knife to cut the fudge into squares. Wipe down the knife if the fudge accumulates while you are cutting.
Notes and Tips
- Use caution when handling the hot bowl of peanut butter and butter. Steam will escape when you remove the plastic wrap and the bowl will be incredibly hot.
- Since this recipe is so simple, make sure you are using quality ingredients. Peanut butter is the star of this recipe, so make sure you chose a brand that you really like. You might even want to opt for the "make it yourself" peanut butter you can get at stores like Whole Foods.
Nutrition
This recipe was originally posted in April 2013. It was updated in February 2021 with new pictures and a few updates to the recipe
Wanda says
I will try it right now so i let you know how came out later.. i always bring peanut butter fudge on Christmas for my nices .
Heather | My Sweet Precision says
I hope that the fudge turned out for you! It's perfect for a Christmas dessert :)
Marisa @ Uproot from Oregon says
This looks so good!! I am going to try this with crunchy peanut butter.
Heather (Sweet Precision) says
Thanks Marisa!! Crunchy peanut butter sounds absolutely AH-mazing! I'm selfishly wishing that I had some leftover still ;)
Dean says
When do you add the vanilla?
Heather says
Good catch Dean, I just updated the recipe! You want to add the vanilla in step #3 right before the confectioners' sugar.
Pamela @ Brooklyn Farm Girl says
I am pinning this fudge right now, it looks incredible!
Heather (Sweet Precision) says
Thanks Pamela! It was dangerous having the entire batch in the house with just two people to eat it! :)
Cat says
These look delicious, I think I just found part of my boyfriend's Christmas present. Thank you =)
Heather (Sweet Precision) says
These are so perfect for holiday gifts because they are SO simple to make!! Hope you enjoy some fuss-free baking :)
chocolatepeanutbutterohmy says
Oh my lordy lord :) yum!
Allison (Spontaneous Tomato) says
Whoa, this looks amazing. I'm not even that in love with peanut butter compared to most people, but I think peanut butter fudge is my favorite kind-- it just brings back memories of when I was a kid (even though even as a kid I probably got to eat fudge about once every two or three years...). This recipe seems so simple too-- only four ingredients?! I'm bookmarking it for sure!
Heather (Sweet Precision) says
The four ingredients is what won me over :) Since I was staying with Matt I wanted something easy where I wouldn't have to buy too many things at the grocery store! I feel like it would be fun to make with little kids- it's so simple!!
Joyous-Crocodile says
Ohhhh yum. I just flicked over to your blog after reading a comment you wrote on Spontaenous Tomato's lemon lime bars...and now I'm in a quandary over which recipe to make first. I LOVE citrus, but peanut butter isn't far behind and this is such a quick recipe.
Heather (Sweet Precision) says
Oh that's a tricky one! The weather has been so nice in DC lately that something lemon lime flavored definitely sounds refreshing and delicious! But this peanut butter fudge is so easy to make. Clearly the answer is to make BOTH!! :)
MOM says
OH YUM!! I certainly hope that some of these made their way to the Chez Hampton for your guests this coming week.
Heather (Sweet Precision) says
I left it all with Matt!! But it's better off that way, it was pretty unhealthy and we didn't need it around tempting us ;)
Francesca says
Heather, I'm not a fan of peanut butter but you managed to make it look very tempting. Lovely pictures.
Heather (Sweet Precision) says
Thank you Francesca!! You would be shocked to hear there was a two week span when Matt and I went through an entire jar of peanut butter ;)