Keto Peanut Butter Fudge | Sugar Free With 5 Ingredients!


This easy keto peanut butter fudge is the perfect quick and simple recipe to prepare as a healthy treat. It’s sugar free, yet sweet and a little salty to give you the balance in flavors you’ve been craving. The best part is that the prep time is only 10 minutes!

Square slices of peanut butter fudge set center stage.

Is Peanut Butter Fudge Keto?

If you want fudge, keto peanut butter fudge is going to be your best option. Traditional peanut butter fudge is packed with sugar and carbs making it inedible for the keto dieter. Our easy keto peanut butter fudge on the other hand is made of simple ingredients like natural peanut butter and sugar free sweetener. There is a total of five ingredients in this sugar free peanut butter fudge recipe, and one is even optional.

How Many Carbs are in Peanut Butter Fudge?

Traditional stovetop peanut butter fudge can have 2-3 cups of pure white cane sugar! That means in a one bar serving you are looking at 23 grams of carbs, 3 of which are fiber, and 14 of which are sugar! A bar also has roughly 220 calories with about 60 of them being calories just from the sugar alone.

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Thick slices of peanut butter fudge sprinkled and surrounded by salt flakes

Sugar Free Peanut Butter Fudge

As said above traditional peanut butter fudge can be loaded with refined white sugar. Our keto peanut butter fudge however is made without sugar or gluten. Instead of cane sugar we chose to use a powdered erythritol sweetener. This can be found by many different brands like Anthony’s erythritol or Swerve erythritol which is a 1:1 replacement with sugar. Adding some form of sweetener not only adds a sugar free form of sweetness, but it also helps thicken the peanut butter fudge recipe so it will set properly. If you don’t have erythritol you can use other powdered keto friendly low carb sweeteners like:

  • Monk Zero– This is a powdered monk fruit and erthritol based low carb sweetener that will work in our peanut butter fudge recipe too.
  • Lakanto Powdered Monk Fruit– Lankanto also makes a powdered erythritol monk fruit blend. It’s a 1:1 sub for powdered sugar and works great in keto recipes
  • Powdered Allulose– Allulose is another low carb powdered sweetener that is perfect to use if you want to make keto peanut butter fudge. It dissolves well, is sugar alcohol free, and has a sweet vanilla like flavor.

All of these keto friendly sweeteners make great options for those wanting to make this keto peanut butter fudge recipe without real sugar or any added carbs.

Powdered vs. Granular Sweetener

In this recipe we chose to use a low carb sweetener that was powdered, also known as confectioners style. This is because a powdered sweetener is much more likely to evenly mix and distribute into the fudge batter. If you don’t have, or don’t want to buy powdered erythritol there is another option. Make keto peanut butter fudge with granular erythritol that you have pulsed in a coffee grinder to make a powder.

caramel colored sliced of peanut butter fudge sprinkled with salt

Is Peanut Butter Keto?

Peanuts are quite controversial in the keto and low carb community. Technically they are a legume which is closely related to beans, thus making them not keto(1). However, for most people’s diets peanuts are a great low carb option packed with fat and protein. So don’t let technicalities deter you from your favorite snack, just enjoy peanuts and peanut butter in moderation!

Peanut Butters That AREN’T Keto

While peanuts can be keto, not all peanut butters can be. Depending on the brand and ingredients you chose, you may be surprised at just how much sugar is added into your peanut buttery snack. Any peanut butters that have added sugar, corn syrup, and/or hydrogenated oils are ones to stay away from. Sadly these are often the most nostalgic brands like Jif and Skippy. Instead opt for peanut butter with 1-2 ingredients, peanuts and salt.

Peanut Butter Macros

While they may not be fully keto approved from the “perfect” keto diet perspective, we still enjoy peanuts and peanut butter all the time. When we can, we love making our own peanut butter. However, when we lack the time typical natural peanut butter is our favorite route to go. For a serving you are looking at 190 calories, 16 grams of fat, 7 grams of carbs (3 grams of fiber), 4 net carbs, and 8 grams of protein per two tablespoons of natural peanut butter.

The Best Keto Peanut Butter

The best keto peanut butters are the simplest. That means it’s a low carb peanut butter with just 1 or two ingredients. Natural peanut butters are usually the best, but always make sure to double check the macros and ingredients. Don’t be fooled by their packaging, instead check to make sure the ingredients are only peanuts and salt; with no added sugars or oils.

Can I Use Homemade Keto Peanut Butter in Fudge

This peanut butter fudge recipe is super simple and often requires no more ingredients than what you already have at home. If you do have a thick homemade keto peanut butter, by all means use it! It will be the most natural and freshest peanut butter since you made it yourself. However, don’t use a keto peanut butter you made if it is too runny or oily. When it’s too liquid-y it won’t set properly and will end up making your keto peanut butter fudge a runny mess.

peanut butter fudge surrounded by spoons of peanut butter

Dairy Free Low Carb Peanut Butter Fudge

There is only 1 ingredient with dairy in this recipe and that’s butter. Butter works really well in fudge because it’s creamy and soft when sat at room temperature. If you are dairy free you can try to sub the butter for coconut oil or dairy free butter. We can’t promise it will be the same flavor profile, but know it will still be tasty in its own way.

More Peanut Butter Recipes

For even more delicious uses for peanut butter check out some of our best peanut butter dessert recipes. Our favorites are our:

  • Keto Peanut Butter Cookies– These keto peanut butter cookies take just 10 minutes to prep and use only 3 ingredients.
  • Ice Cube Peanut Butter Cups– Another easy gluten free keto treat! With just two ingredients and a standard ice cube mold you can have keto peanut butter cups in minutes.
  • Low Carb Peanut Butter– That’s right, homemade keto peanut butter! Our recipe is thick, smooth, and even uses mct oil. It’s super quick to whip up and can be made even simpler with coconut oil.

The peanut butter fun doesn’t stop there, if this peanut butter fudge recipe isn’t enough search “peanut butter” on our blog to find even more recipes.

How to Make Keto Peanut Butter Fudge

Our keto peanut butter fudge is so delicious yet easy to make, we know you’ll be making the recipe again and again.

Ingredients

To make keto peanut butter fudge you need just 5 simple ingredients. Most people already have them at home. You will need natural low carb peanut butter, unsalted butter (because we will be adding salt), powdered erythritol sweetener, vanilla extract, and flakey salt to go on top. The salt is optional, but we love the contrast of sweet and salty. It’s even better if you are using unsalted butter and peanut butter.

peanut butter fudge ingredients

Making Low Carb Peanut Butter Fudge

Begin by lining a loaf pan with parchment paper. Then in a microwave safe bowl melt the butter until it is fully liquified.

Melted butter in a glass bowl

Now add in your powdered sweetener of choice.

powdered sweetener being sprinkled into a glass bowl of melted butter

Whisk well to ensure all the sweetener has dissolved. You can microwave it in 30 second intervals if it isn’t fully combining.

A hand whisking butter and white powdered sweetener together

Now add in the peanut butter and vanilla extract. Whisk again until all the ingredients combine.

Adding peanut butter into butter mixture

Pour the fudge base into your parchment paper lined pan and sprinkle some flakey salt on top if desired.

a loaf pan lined with parchment paper is filled with fudge

Refrigerate for at least an hour, or until fully set. You can then carefully slice the fudge into 14 pieces. We like to run a knife under hot water to help with slicing frozen fudge.

slicing peanut butter fudge

How to Store Sugar Free Keto Peanut Butter Fudge

Our keto peanut butter fudge stores best in an airtight container inside the fridge for up to a week. You can also freeze the fudge without issue if you want to store it for up to three months. Simply slice the fudge and place layers of slices in-between parchment paper in an airtight freezer bag.

Fudge on sheets of wax paper with a bite taken out of a piece

Tips to Make the Best Keto Peanut Butter Fudge

This recipe is so simple it’s almost impossible to mess up. However, there are a few tips to making the smoothest and creamiest keto peanut butter fudge every time. Our best tips are:

  • Use Thick Peanut Butter– Peanut Butter that is too runny can cause a liquid batter that doesn’t set. It’s better to air on the side of caution and have thicker peanut butter than too thin.
  • Add Some Extra Protein– If you want to make the fudge more like a protein snack you can add a scoop or two of protein powder to the batch to make it more substantial.
  • Keep it Cool– Store your finished fudge in the freezer or fridge to ensure it doesn’t become too soft and melt in your fingers.

These are just a few tips we’ve found to keep our fudge tasting the best. If you come up with any other great tips be sure to leave them in the comments below for us to add into the post.

More Keto Desserts

For more easy keto recipes try out some of our simple low carb desserts. We know you’ll love our:

  • Keto Apple Crisp– Soft and tender “apples” with a spiced cinnamon crumble on top. It’s even better when paired alongside keto vanilla ice cream.
  • Chewy Chocolate Chip Cookies– Chewy and gooey cookies stuffed with low carb chocolate chips. There’s nothing better than freshly baked cookies with gooey chocolate chips!
  • Keto Banana Bread– We had to get in our nutty loaf fix. This keto banana bread is perfect topped with walnuts and crunchy nut butter.

Each recipe is sure to cure your sweet tooth and has a serving size that will actually satisfy you. Plus both our cookies and banana bread is even better with some homemade nut butter slathered on top. Everyone knows peanut butter and chocolate is the perfect sweet tooth fix.

Keto Peanut Butter Fudge

Our sugar free fudge just melts in your mouth and has just 5 total ingredients, one of which is optional! We hope you can’t wait to try this keto peanut butter fudge, because we know you are going to love it just as much as us. The keto fudge has hints of salt and vanilla extract, as well as tastes amazing with some sugar free chocolate chips drizzled on top. Try this keto fudge and try it soon, it’s definitely not a recipe you want to miss out on!

Keto Fudge Pin
peanut butter fudge on top of wax paper

Keto Peanut Butter Fudge

This peanut butter fudge is the perfect sugar free way to get in your sweet fix on a keto diet. It’s high in fat and has a rich and creamy peanut butter flavor.

Instructions:

  • Line a loaf pan with parchment paper and set aside.

  • In a microwave-safe bowl, add the butter, and microwave it until completely melted.

  • Add in the erythritol and stevia, and whisk well. Microwave in 30-second intervals, whisking in between until all the sweetener is melted.

  • Add in the peanut butter and vanilla extract. Whisk until a homogeneous mixture forms.

  • Pour the mixture into the lined pan, and sprinkle some flakey salt on top if desired.

  • Refrigerate until set at least for an hour.

  • Cut into 14 2×2 inch pieces or smaller .

  • Store in an airtight container in the fridge.

Notes

Net Carbs: 2

  • Don’t use homemade peanut butter if it’s too runny. Only use peanut butter brands that have firm consistencies.
  • If you like a sweeter fudge, you can increase the sweetener amount to 1 cup

Nutrition Facts

Keto Peanut Butter Fudge

Amount Per Serving

Calories 168
Calories from Fat 144

% Daily Value*

Fat 16g25%

Saturated Fat 6g30%

Trans Fat 1g

Cholesterol 17mg6%

Sodium 86mg4%

Potassium 122mg3%

Carbohydrates 3g1%

Fiber 1g4%

Sugar 2g2%

Protein 5g10%

Vitamin A 203IU4%

Calcium 10mg1%

Iron 1mg6%

* Percent Daily Values are based on a 2000 calorie diet.



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