Easy Sugar Free Keto Peanut Butter Fudge

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Easy Sugar Free Keto Peanut Butter Fudge is the best sweet treat to satisfy your fudge craving! Enjoy the richness and creaminess of fudge without all the sugar.

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side view of keto peanut butter fudge with a bowl of peanut butter in the background

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Sugar Free Keto Peanut Butter Fudge

There aren’t many flavors better than peanut butter and chocolate. Peanut butter and chocolate is a match made in… flavor town! In this sugar free keto peanut butter fudge, the two have been perfectly married together so that YOU can live happily ever after!

This isn’t the first time we’ve used these two ingredients to make a delicious treat! If you’re as crazy about peanut butter and chocolate as we are, check out our Low Carb Double Stuffed Peanut Butter Cups! They are rich, super creamy, and full of keto-friendly flavor.

Not only does this sugar free fudge taste great, but it also has the best texture! Not only is fudge supposed to taste great, but it’s also supposed to have that melt-in-your-mouth texture that is unlike any thing else. This keto peanut butter fudge has exactly that!

We used Lakanto’s powdered monkfruit to get the perfectly creamy and smooth texture of the fudge you know and love! This sugar free fudge is so rich and satisfying that one piece is probably enough to cure your sweet tooth, making this an awesome snack that will last all week! 

top view of keto peanut butter fudge

Best Keto Chocolate Chips To Use

Our absolute favorite chocolate chips to use for this keto peanut butter fudge is ChocZero’s milk chocolate chips! ChocZero makes the absolute best keto friendly/low-carb chocolates on the planet, so naturally their chocolate chips are great for this keto peanut butter fudge.

The great thing about ChocZero though is that they always offer a variety of flavors with just about everything they make. If you prefer dark chocolate chips or even white chocolate chips, ChocZero has you covered! And just like all of their products, ChocZero’s chocolate chips are completely sugar free/zero glycemic, low in carbs, and taste just as good as (if not better!) regular chocolate chips.

There is no nasty aftertaste to deal with, or any chalk-like “chocolate” that you’ll have to try and choke down. ChocZero just makes incredible chocolate that everyone loves!

If you shop ChocZero’s site, be sure to use our code, “buttertogetherkitchen” at checkout to save 10% on your entire order! This code is good for anything on their site, including chocolates, barks, syrups, spreads, and everything else! And of course, all of their products are completely keto/low-carb friendly!

How To Make Keto Peanut Butter Fudge:

nine photo collage of keto peanut butter fudge

  1. Over medium-high heat, warm the heavy cream and butter in a pot.

     2.  Whisk in sweetener and bring mixture to a low boil.

     3.  Stir constantly to ensure that the mixture does not burn; add in vanilla extract.

     4.  Once mixture begins to thicken and turn a golden-brown color, remove from heat.

     5.  While the mixture is still very hot, add in peanut butter.

     6.  Whisk until creamy.

     7.  Pour entire mixture into a pan lined with parchment paper. 

     8.  Ensure that mixture has settled evenly. 

     9.  Sprinkle with chocolate chips and allow to freeze for an hour, then place in fridge for at least 2 hours!

close up image of peanut butter fudge with two on the bottom and one piece of fudge stacked on top

Try This Monk Fruit Sweetened Keto-Friendly Fudge For Dessert!

This Keto Fudge recipe, like most of all my keto dessert recipes, is sweetened with Lakanto Monk Fruit Sweetener, which is a natural and net-carb free sweetener.

Particularly, this recipes uses their powdered sugar substitute, Lakanto Powdered Sweetener! We have loved this brand and their products from the beginning of our keto journey. We really do find it the best tasting sweetener without any aftertaste or cooling affects that many other keto-friendly sweeteners have. 

If you’ve never tried monk fruit sweetener, we highly recommend giving it a try! We love their classic, powdered, and golden sweeteners! You can use code “BUTTERTOGETHER” for 20% off your Lakanto order on Lakanto’s website.

Nutrition (per serving) Makes 10 Pieces

Calories: 200.6 | Fat: 19g | Carbs: 6.27g | Fiber: 2.52g | Protein: 3.63g | Net Carbs: 3.75g

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Keto Peanut Butter Fudge

Keto Peanut Butter Fudge


20 minutes

10 Servings


1 cup Heavy Whipping Cream
2 tbsp Unsalted butter
⅓ cup Lakanto Powdered Sweetener
1 tsp Vanilla extract
½ cup Natural peanut butter
⅓ cup Lily’s baking chips
Nutritional Information
201 Calories
19g Total Fat
-2.5g Net Carbs
3.5g Protein


Heat the heavy whipping cream and 2 tbsp of butter in a pot over medium high heat. 
Whisk in Lakanto's powdered monkfruit until well combined and bring the mixture to a low boil. 
Stir continuously and add in 1 tsp of vanilla extract. Continue to cook the mixture down over medium heat until it thickens and begins to turn a bit light brown in color. 
Once thickened, remove the mixture from heat and whisk in the peanut butter until smooth and creamy. 
Pour the mixture into a parchment lined loaf or other small pan. 
Wait for the mixture to cool for a few minutes, then sprinkle ⅓ cup of Lily’s baking chips across the surface of the fudge. 
Place the fudge into the freezer for 1 hour, then chill in the fridge for at least 2 hours.
Slice the fudge into 10 pieces and serve. Store remaining fudge in an airtight container in the freezer. 

Nutritional Disclaimer: We are not certified nutritionists. Nutritional data is provided as a courtesy. The information provided is calculated through a free-web based nutrition calculator and is not guaranteed to be accurate. To ensure we provide you with good information, we look at a variety of calculators.


  • Cátia

    Hi! Do you think that I could substitute peanut butter for almond butter with the same amount? I’m intolerent to peanuts.

  • Amy

    Hello, my fudge broke and separated after whisking in the peanut butter. Do you know what I possibly did wrong?

    • Kasey

      Is it possible the other ingredients cooled off before you whisked in the peanut butter? They should be hot when the peanut butter is added. Hope this helps!

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