Keto Peanut Butter Fudge

Fudge is one of those things that seems impossible on a keto diet. But this peanut butter fudge proves that wrong in the best way possible.

It’s smooth, rich, and packed with peanut butter flavor. You really won’t believe it’s sugar free and low carb when you taste it.

The recipe is super straightforward. You basically stir a few things together in a bowl, spread it in a small pan, and let it set in the freezer. That’s the whole process.

I love keeping a batch of these in the freezer for when I want something sweet after dinner. They’re the perfect little keto friendly treat to have on hand.

A sprinkle of flaky sea salt on top takes them to another level. That salty-sweet contrast is what makes this fudge so addictive.

Why You’ll Love This Recipe

Only 5 Ingredients – You need just five simple ingredients to make this rich and creamy peanut butter fudge.

Healthy Fats to Keep You Full – Peanut butter and coconut oil pack this fudge with satisfying fats that actually keep hunger away.

Satisfies Sweet Cravings on Keto – This fudge tastes like a real peanut butter treat without knocking you out of ketosis.

Ready in Minutes – The hands-on prep takes under 5 minutes so you just mix and freeze.

Recipe Ingredients

• 1 cup Creamy Natural Peanut Butter (no sugar added)
• 1/2 cup Coconut Oil, melted
• 1/3 cup Powdered Erythritol
• 1 tsp Vanilla Extract
• 1/4 tsp Salt
• Flaky Sea Salt for topping

How To Make

Step 1

Line a small 8×4 inch loaf pan with parchment paper, leaving an overhang on the long sides for easy removal.

Step 2

In a medium bowl, stir together the peanut butter and melted coconut oil until completely smooth and well combined.

Step 3

Add the powdered erythritol, vanilla extract, and salt. Mix until the sweetener is fully dissolved and the mixture is uniform.

Step 4

Pour the fudge mixture into the prepared pan and spread it into an even layer with a spatula. Sprinkle the top with flaky sea salt.

Step 5

Freeze for at least 2 hours, or until the fudge is completely firm and solid.

Step 6

Lift the fudge out using the parchment overhang and cut into 16 small squares. Store in the freezer or refrigerator, as the fudge softens quickly at room temperature.

Tips

Stir Your Peanut Butter Before Measuring

Natural peanut butter separates in the jar, with oil sitting on top and a thick paste at the bottom. If you scoop from the bottom without stirring, your fudge will be too thick and crumbly instead of smooth.

Give the whole jar a really good stir until it’s creamy and uniform, then measure out your cup. This makes a huge difference in how the fudge turns out.

Make Sure the Coconut Oil Isn’t Too Hot

You want the coconut oil melted but not hot. If it’s too warm when you mix it with the peanut butter, the mixture will be super runny and take much longer to set in the freezer.

Let it cool down for a few minutes after melting so it’s liquid but closer to room temperature. This helps everything combine smoothly and set up faster.

Use Powdered Erythritol, Not Granulated

If you only have granulated erythritol, pulse it in a blender or coffee grinder until it becomes a fine powder before adding it. Granulated erythritol won’t dissolve into the fudge mixture and you’ll end up with a gritty, crunchy texture.

Powdered erythritol blends in completely and gives you that smooth, creamy fudge consistency you want.

More Recipes

• Keto Peanut Butter Buckeyes
• Keto Peanut Butter Cups
• Low Carb No-Bake Peanut Butter Chocolate Bars
• Low Carb 3-Ingredient Peanut Butter Cookies
• Low Carb Salted Caramel Fudge

Frequently Asked Questions

Can I use regular peanut butter instead of natural peanut butter?

Natural peanut butter is really important here because regular peanut butter usually has added sugar and hydrogenated oils, which adds extra carbs and changes the texture. Natural peanut butter is just peanuts and sometimes salt, so it keeps this fudge low carb and keto-friendly.

If all you have is regular peanut butter, it will still set and taste fine, but you will be adding hidden sugars and the net carb count will be higher. Always check the label and look for one with no added sugar.