You can make this rich, creamy keto peanut butter fudge using only five ingredients that most people have on hand.

This keto peanut butter fudge recipe is perfect for sharing or freezing for a later date. Dairy-free option included.

If you love fudge you’ll also want to try my chocolate keto fudge recipe.

Keto Peanut Butter Fudge Recipe

If you love peanut butter and you love treats with peanut butter, you’re going to want to make this easy keto peanut butter fudge. This low carb peanut butter fudge recipe is super simple to make.

You can add chopped nuts, sugar-free chocolate chips or a little sea salt for a fun add-in option. You can also wrap individual pieces and give them away as gifts.

How to make keto peanut butter fudge:

1. Add the peanut butter and butter to a medium mixing bowl. Cover the bowl and microwave for a minute at a time, until the butter is melted.
2. Remove the bowl from the microwave and add the vanilla and salt. Stir until the mixture is well combined. Be careful, the bowl will be hot.
3. Add the sugar-free powdered sugar and stir until completely combined.
4. Transfer keto peanut butter fudge into your prepared pan and smooth the top.
5. Cover and chill for at least 6 hours or overnight.
6. To cut the peanut butter fudge, lift the parchment paper with the fudge out of the pan and place it on a cutting board before cutting into squares.

These numbered steps match the numbered photos above and are for illustration purposes only. Please see the printable recipe card below for the full set of instuctions.

How to make keto peanut butter fudge on a stove top:

In a medium sauce pan, melt sugar-free peanut butter and butter together over medium heat. Add in vanilla and salt and stir until combined.

Add in the sugar-free powdered sugar and stir until combined. Follow the remaining steps above for setting the fudge.

Can you freeze peanut butter fudge?

Yes, most fudge recipes freeze well, especially this keto peanut butter fudge recipe. You can freeze this peanut butter fudge in a sealed container for up to three months.

Can I use homemade peanut butter to make peanut butter fudge?

I don’t typically recommend homemade peanut butter when making keto peanut butter fudge as it tends to have more oil and be runnier, which makes it hard to set up properly.

If you have thick homemade peanut butter go ahead and give it a try, otherwise use store bought sugar-free peanut butter.

Dairy-free Keto Peanut Butter Fudge

Use dairy-free butter to make this keto peanut butter fudge dairy-free. We’ve used earth balance butter spread with success. I haven't tried coconut oil in this recipe, but when I do, I'll post about it here.

Sugar-Free Peanut Butter

Peanut butter is naturally a little sweet but most brands add sugar. You’ll want to look for a natural peanut butter that is either sugar-free or has no added sugar.

Sugar-free peanut butters sometimes add sugar alternatives. Look at labels and pick which one is best for you.

Love peanut butter? Try these keto peanut butter cookies next. You could also try a recipe for Ice Cream with Nuts. Just use a low sugar option.

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