Keto Peanut Butter Fudge

This easy keto peanut butter fudge is rich, creamy and sweet. It takes only 5 minutes to prepare and requires just 4 ingredients. The best part is that one square is 0 net carbs.

This sugar free peanut butter fudge recipe has been on my blog for several years and it is a reader favourite. It used to be called keto fudge.

But, I have just moved it to this new URL. And the keto fudge you will find at the original URL is proper chocolate fudge.

Now, everything is in the correct place!

The best part of updating an old post is that I get to make the recipe again. This way, I can refresh my memory about the process and add more details, tips and tricks.

And I get to enjoy a batch of what I think is a sensational keto snack!

Traditionally, fudge is made with condensed milk. And I do have a sugar-free condensed milk recipe on my website.

But, this keto-friendly peanut butter fudge is a no-cook recipe, just like my cocoa fat bombs. You simply stir the ingredients together and chill them until firm. It is such an easy treat.

Jump to:

• 🌟 Why You'll Love This Recipe
• Ingredients
• Variations
• Instructions
• Top Tips
• Substitutions
• Toppings
• Recipe FAQs
• Related Recipes
• Recipe

Ingredients

Here are the ingredients you'll need:

• Peanut Butter - I used smooth peanut butter. Stir it first to make sure it is soft and creamy. Crunchy peanut butter also works.
• Butter - Butter helps to set the fudge. It also makes it taste even more decadent. You can use salted or unsalted butter.
• Powdered Sweetener - Allulose is the best sweetener for this fudge recipe because it does not re-crystallise as it cools.
• Protein Powder - I like to use unflavoured whey protein powder.
• Vanilla extract and sea salt - These are optional. However, I recommend using both because they enhance the flavour.

See the recipe card for full information on ingredients and quantities.

Variations

You can replace the whey protein powder with any other unflavoured protein powder. The flavoured ones often contain sugars.

Collagen protein powder also works well.

Alternatively, use 2-3 tablespoons of coconut flour to thicken the fudge instead of using protein powder. I tested this in my Low Carb Peanut Butter Protein Bars.

You could also use 5-6 tablespoons of almond flour.

Please be aware that using low carb flour instead of protein powder will make the peanut butter fudge texture a little more gritty.

Instructions

It is very simple to make a keto peanut butter fudge. Here are the basic steps.

For the full recipe, scroll down to the recipe card.

Step 1: Melt the butter in the microwave. Put all ingredients into a mixing bowl bowl and stir with a fork until a smooth batter forms.

Step 2: Line a 5x7 inch tray with parchment paper and spread the fudge mixture into the pan. Level the top with a spatula.

Step 3: Freeze the fudge until set. Then, cut it into 1.5-inch squares with a sharp knife.

Step 4: Enjoy!

Top Tips

Allulose is the best sweetener for this low-carb fudge recipe because it melts just like sugar. Alternatively, I recommend that you use a powdered sweetener. Don't use a granulated sweetener or the end result will be gritty.

My tray was actually larger than 5x7 inches. I used a scrunched-up piece of aluminium foil as a barrier underneath the parchment paper. This way, I managed to only use ⅔ of my tray without the fudge spreading.

You can also use a loaf pan.

Heat the knife blade under hot water before cutting. This way you will get sharp edges as the knife will glide through the fudge. Clean the blade between cuts.

Substitutions

You can make this fudge with any nut or seed butter. Almond butter would work well, and sunflower seed butter would be a good alternative too.

Chocolate fans can turn this fudge chocolatey by adding 2 tablespoons of cocoa powder. Or, check out my Keto Chocolate Peanut Butter Fudge. It includes LOTS of melted chocolate and tastes divine.

You could also add spices such as 1-2 teaspoons of cinnamon or cardamom. If you are feeling like autumnal flavours, add a little pumpkin spice.

Toppings

You can sprinkle coarse sea salt flakes over the fudge. Or, top it with chopped peanuts.

Another idea is to drizzle the fudge with melted sugar-free chocolate or stir sugar-free chocolate chips into the batter.

Recipe FAQs

Related Recipes

Here are more easy keto desserts with peanut butter:

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