Keto Peanut Butter Fudge
Ultra creamy, three-ingredient Keto Peanut Butter Fudge that is only 2 net carbs per slice!
My favorite Keto Peanut Butter Fudge has only three ingredients and takes just a few minutes to make. This ultra creamy fudge has a caramel base that adds a rich flavor you will love! Once you make the keto caramel, just stir in peanut butter, freeze and top with a little sea salt for a decadent keto holiday dessert! For more fun fall recipes, check out this list of 20+ Easy Fall Desserts!
The ultra low carb count makes this fudge a great keto snack. This could also be called a keto fat bomb. A ketogenic diet is a low-carb, high fat diet. When on keto your primary energy source is fat, so people often add fat bombs to their diet to meet their quota or add a little boost. Fat bombs can be sweet or savory they must be low in carbs and high in fat.
Ingredients in Keto Peanut Butter Fudge
This low carb peanut butter fudge recipe has three ingredients:
- butter
- swerve brown sugar sweetener
- peanut butter
You will find this recipe has the best flavor and results with butter and the brown sugar swerve. If you swap those for granular Swerve it will lack the same rich caramel flavor that the brown sugar version provides.
However it will still be sweet and delicious, just not quite the same. You definitely can switch the peanut butter for a different nut butter, just make sure it is a low carb/no sugar added version to keep your carbs at bay.
Can You Have Peanut Butter on Keto?
Yes! For this recipe, any peanut butter will work so long as it’s not one of the high-carb versions that contain extra honey or sweeteners.
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How to Make Keto Peanut Butter Fudge
This keto-friendly peanut butter fudge couldn’t be simpler to make! Here are the basic steps:
- In a sauce pan, melt the butter and add brown sugar.
- Stir continuously until sugar dissolves and it begins to simmer and a thick brown caramel begins to form.
- When the sauce is thickened and looks like caramel remove from heat and stir in the peanut butter until melted.
- Line a loaf pan with wax paper and carefully pour the fudge into the pan.
- Freeze until completely set.
- Peel the wax paper away from the fudge and slice.
- Top with sea salt as desired.
How to Store Keto Fudge
After slicing I find these store best in an air tight container in the freezer. Simply set them out one at a time for a few minutes to allow them to thaw. When thawed just a bit they melt in your mouth!
Tips for Making Low-Carb Peanut Butter Fudge
- For added flavor, add 1 teaspoon vanilla extract to the keto fudge.
- I like to slice the loaf of fudge into three long, skinny rows, then slice the long rows into 7 chunk-size pieces.
- If stored in the freezer, this keto-friendly peanut butter fudge will last up to 3 months.
More Keto Desserts:
- Keto Cheesecake Brownies
- Keto Lemon Bars
- Keto Cranberry White Chocolate Macadamia Nut Cookies
- Keto French Silk Pie
- Keto Fruit Pizza
Get the Recipe: Keto Peanut Butter Fudge
Ingredients
- 8 tablespoons butter, 1 stick
- 1/2 cup brown sugar swerve sweetener
- 1 cup peanut butter
- 1 teaspoon vanilla extract, optional
Instructions
- Heat a medium size sauce pan over medium heat. Melt butter, then add brown sugar. Stir continuously until sugar dissolves and it begins to simmer and a thick brown caramel begins to form. This usually takes 6-8 minutes for me. (see video below)
- When the sauce is thickened and looks like caramel remove from heat and stir in the peanut butter and vanilla extract (if using) until melted.
- Line a loaf pan with wax paper and carefully pour the fudge into the pan.
- Freeze 30 minutes or until completely set.
- Peel the wax paper away from the fudge and slice. (I slice the loaf into three long skinny rows, then slice the long rows into 7 chunk size pieces.)
- Top with sea salt as desired.
- Store in freezer.
Love how quick and easy this is to make! I see myself making this often!
These look like little bites of heaven! The perfect cure for my sweet tooth; yum!
These look like the perfect little treat to satisfy my sweet tooth.
So delicious, best peanut butter fudge I’ve had in a while!
Oh yum! I have never made fudge, but it’s always been one of my favorite desserts! Can’t wait to try this! Might have to make for Thanksgiving!!! Thanks!
These sound delicious! Dangerously good…
I love peanut butter flavor! These look so delicious!
I spread melted lilys dark chocolate on top and froze. So good!!!!!
Sounds delish!
Delicious!
Do you pack the swerve brown sugar like you do regular brown sugar when you measure it?
Hi Valorie, yes I do. I hope you enjoy!!
Can I use the Monkfruit Golden in place of the Swerve?
Hi Carol, I have not tested that in this recipe but I believe it would work. I hope you enjoy!
Where is the video?
Tracy, it is in the center of the post and in the recipe card. If you cannot see it you will need to turn off your ad blocker.
Husband and Son love this !! Can I use regular brown sugar ? I’m not fond of Truvia or Swerve ?
Hi Iris, I’m so glad! I have not tried it with regular brown sugar but I believe that would work if you aren’t concerned with keeping it keto. I hope you enjoy! 🙂
First time that I made this I cooked the sauce too long and it had a burnt taste.?. I still ate them though they weren’t bad! I am going to try this recipe again with almond butter and I will keep it at 6 to 8 minutes?? thanks for this recipe, they are delicious even with a slight burnt taste ?!!
How many carbs in each piece?
Hi Imogene, the complete nutrition information is listed right below the recipe
Looking forward to giving these a try. Does it matter what kind/type of peanut butter I use? Is something like Jiff or Peter Pan okay?
Yes that works just none of the high carb versions that add extra honey and sweeteners 🙂
This is the best peanut butter fudge I have ever had. Also the easiest fudge to make! Bravo!!
Does it have to be Brown sugar Surve or can I substitute white ?
For this recipe I do not recommend a substitute
Can’t wait to try these! I have LOVED all the recipes I’ve tried so far & LOVE the meal plans. Your site has single handedly made my transition to Keto so easy! Thank you!
Would this work to make, break up small and mix in low carb homemade ice cream?
Turned out awesome! I used truvia brown sugar but followed the recipe exactly… super excited about this quick, simple, and easy recipe! Thanks for sharing!
Made this with Lakota Golden Monkfruit And my husband and I love it!! Thank you!
About my tenth time of making this. We love it. I love how simple it is to make. I wish I had words to describe how it tastes when you just take a bite and it starts to melt a little in your mouth. Pure peanut butter delight! Thank you for sharing this!
These are by far the best keto dessert I’ve had so far! I’d make these every day if I could, lol.
Unsalted or salted butter! Thank you!
Lura, I’ve used both with excellent results, it is your preference.
Hi, I plan on making this for my family!! Question…where did you buy your enameled saucepan for this recipe?!? Is it Le Creuset?!? Thank you 😊
Could I add keto cocoa powder? Do you think this would still work or would it be too dry to hold together? Also, when and how much would you maybe recommend adding?
I can’t get the consistency correct with the Swerve and butter. First time I had the heat higher but it wouldn’t thicken up. Second time over lower heat and it was thicker but the fudge ended up grainy. This third time I kept on medium heat, I kept it there for a long time and it smells like I over cooked it. It never did thicken up. I just put them in the freezer but I don’t think they are going to turn out well. Any pointers on the heat? They taste great. Thank you.
Hi Bill, I just use medium heat in this recipe and it only requires a few minutes of cook time. Perhaps you can watch the recipe video and it may help.
looks fabulous! I think I’ll add maple flavoring instead of the vanilla.