Peanut butter fudge is my favorite kind of fudge. It has a great balance of salty and sweet and the way it just dissolves in your mouth is dangerously addictive. It helps that this recipe is easy, basically foolproof, and there’s no worrying about chocolate burning or crystals forming!
What You’ll Need for This Recipe
Peanut Butter: You can use smooth or crunchy peanut butter. Make sure to stir natural peanut butter very well before using.
Butter: If you’d like to use salted butter then omit the added salt.
Salt: The salt is optional so feel free to skip, especially if the peanut butter you’re using is salty.
How to Make peanut butter fudge
1. Line an 8×8 inch dish with parchment paper or foil. Sift the powdered sugar into a bowl then add the peanut butter and butter to a medium pot.
2. Place pot over medium heat and bring to a boil while stirring regularly. Once the mixture comes to a full boil remove from heat.
3. Stir in the vanilla extract then dump the powdered sugar in and stir until incorporated.
5. Immediately transfer the fudge to your prepared dish and smooth with a spatula. Set aside until cooled and firm. 
Once the fudge has set cut into roughly one inch pieces. Store in an airtight bag or wrap individually in wax or parchment paper.
Pro Tips for this Recipe
- This recipe doubles very easily for a big batch perfect for gifting.
- Crunchy peanut butter is great in this recipe as is a swirl of chocolate added at the end.
- If you love salt try sprinkling on some flaked sea salt after smoothing the fudge.
- Natural peanut butter can be a bit oily so if you’re using it then make sure to stir that jar REALLY well before using!
Frequently Asked Questions
What’s the best peanut butter to use?
- If you’re using a natural peanut butter without stabilizers then make sure to mix really well after opening the jar. The oil heavy top of that jar will make runny fudge.
- Any brand that you enjoy the taste of plain will be a great!
- Crunchy and creamy peanut butter both work well.
How long can you store it?
Stored in an airtight container it will last for up to three weeks in the fridge or two months in the freezer.
How long does it take to harden?
It should harden in about an hour. You can chill it in the refrigerator but this is not necessary.
Why is my peanut butter fudge grainy?
You may have used too much sugar, meaning there’s not enough liquid to dissolve it. Using a scale to measure will reduce the likelihood of this happening.
Can you make it in the microwave?
Yes! Heat the butter and peanut butter until it melts. You’ll want to heat in 30 second intervals stirring in between. Stir in the vanilla and sugar then transfer to your dish.
If you love this recipe try these out!
If you’ve tried this recipe then don’t forget to leave a rating and let me know how you got on in the comments below, I love hearing from you!
Peanut Butter Fudge
Ingredients
- 3 cups powdered sugar 360g, sifted
- 1 cup peanut butter 250g, smooth or chunky
- 1 cup unsalted butter 226g
- 2 tsp vanilla extract 10mL
- 1/4 tsp salt optional
Instructions
- Line an eight inch square dish with foil or parchment paper.
- Add the butter and peanut butter to a medium pot then place over medium heat and bring to a boil stirring occasionally.
- Bring to a steady boil then remove from heat and stir in the powdered sugar and vanilla.
- Once the sugar is completely stirred in transfer to your prepared dish and smooth with a spatula. Set aside to cool and set (about an hour).
- When the fudge has set you can invert onto a cutting board, remove lining and cut into squares.
Video
Notes
- This recipe doubles very easily for a big batch perfect for gifting.
- Crunchy peanut butter is great in this recipe as is a swirl of chocolate added at the end.
- If you love salt try sprinkling on some flaked sea salt after smoothing the fudge.
- Natural peanut butter san be a bit oily so if you're using it make sure to stir that jar REALLY well before using!
