Keto Peanut Butter Bars

Annie Lampella @ Ketofocus

By Annie Lampella, Pharm.D.

Published May 8, 2021 • Updated February 2, 2026

Reader Rating
5 Stars (1 Reviews)

This post may contain affiliate links. See my disclosure policy.

No-bake chocolate peanut butter bars with a thick, fudgy peanut butter layer and sugar-free chocolate on top, finished with flakey sea salt. Rich, creamy, and only 5g net carbs per bar.

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Keto Peanut Butter Bars

5 (1) Prep 150m Total 150m 12 servings

Ingredients

Step by Step Instructions

Step by Step Instructions

1
Peanut butter layer

In a large bowl, add peanut butter or nut butter, almond flour, coconut flour, powdered sweetener, vanilla and salt. Mix until combined. Add 2 tablespoons of melted coconut oil if the mixture seems dry.

peanut butter mixture in a bowl
2
Assemble peanut butter layer

Press peanut butter mixture into a parchment lined square baking dish. Freeze for 30 minutes to harden.

pressing down peanut butter mixture with a white rubber spatula
3
Melt chocolate

In a medium bowl, combine sugar free chocolate chips with 2 tablespoon coconut oil. Melt in the microwave at 30 second intervals, stirring in between, until melted. Option to melt using the double boiler method.

melted chocolate pouring into a bowl
4
Chocolate layer

Pour melted chocolate over the top of peanut butter layer. Sprinkle with flaky sea salt if desired. Freeze for 2 hours to set the chocolate. Cut into 12 bars.

cutting chocolate bars with a knife
Nutrition Per Serving
359 Calories
31.7g Fat
10.7g Protein
5.2g Net Carbs
19g Total Carbs
12 Servings
Nutrition disclaimer

The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.

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Keto Peanut Butter Bars

Frequently Asked Questions

Can I use a different nut butter instead of peanut butter?

Yes! Almond butter, cashew butter, or sunflower seed butter all work. Just check that there's no added sugar. The texture stays the same but the flavor will change.

What can I use instead of erythritol for sweetening?

Stevia, monk fruit, or allulose all work. If you're using a liquid sweetener, you'll need less since they're more concentrated. I prefer allulose here because it doesn't have the cooling effect erythritol sometimes has.

How should I store the keto peanut butter bars?

Airtight container in the fridge for up to a week. For the freezer, wrap each bar individually in parchment paper first so they don't stick together. They'll last about 3 months frozen.

Can I make these bars dairy-free?

The base recipe is already dairy-free. Just double-check your chocolate chips since some brands add milk. ChocZero's dark chocolate chips are dairy-free.

Are these bars suitable for a vegan diet?

The base ingredients are plant-based already. Just confirm your chocolate chips are dairy-free and you're set.

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Chocolate Peanut Butter Bars

sliced bars of chocolate peanut on a parchment paper

These are one of my favorite no-bake treats – thick peanut butter filling, sugar-free chocolate on top, and zero oven time.

I eat them as a dessert after dinner or grab one as a pick-me-up in the afternoon. The almond flour and coconut flour give the base structure without making it dense, and the chocolate layer on top is rich and salty against that creamy peanut butter filling.

They work great as a fat bomb too, and with about 10 grams of protein per bar from the peanut butter, they’re surprisingly filling.

four peanut butter bars stacked up with chocolate chips around

Is Peanut Butter Keto?

Peanuts are higher in carbs than almonds, pecans, or macadamia nuts, so you do need to watch portions on keto. Each bar here comes in at just 5.2g net carbs, so they fit a low-carb day without any stress. And honestly, nothing tastes quite like peanut butter. Almond butter is close, but when you’re craving that peanut butter-chocolate combo, just make these.

Look for a peanut butter where the ingredients list is just peanuts and salt. Skip anything with added sugar or hydrogenated oils.

Can I Use Another Nut Butter?

Yes! Almond butter, cashew butter, or sunflower seed butter all work. Just make sure there’s no added sugar in whatever you pick. The flavor will be different but the texture stays the same.

four chocolate peanut butter bars with chocolate chips in a container and around

Is Chocolate Keto?

I use ChocZero’s sugar-free chocolate chips for these. They’re sweetened without sugar alcohols, so no weird cooling aftertaste. Use my code KETOFOCUS for 10% off your order.

Melt Chocolate

Sugar-free chocolate can seize up if you overheat it. Microwave in 30-second bursts and stir between each one.

You can also melt it with a little coconut oil in a double boiler if you prefer more control. Either way, pour it over the peanut butter layer and spread it evenly to the edges.

a peanut butter bar with a chocolate layer and flaky sea salt on top

Can I Make Peanut Butter Cups with This Recipe?

Absolutely! Spoon the mixture into mini muffin liners, press it down, and refrigerate until firm. Top with melted chocolate and you’ve got peanut butter cups.

How To Make These Bars

The whole recipe is four steps: mix the base, press it into a pan, freeze to set, then pour chocolate on top. The key is giving it enough time to firm up in the freezer before adding the chocolate.

About two hours total freeze time and you’re slicing into bars.

Tips For The Best Bars

The ingredient cost is a bit higher than regular desserts, but this recipe makes 12 bars. Per bar, it’s cheaper than any store-bought keto snack bar.

This is a great recipe for experimenting. Try crushed coconut, sliced almonds, or chopped pecans on top.

I use unsalted peanut butter so I can control the salt with flakey sea salt on top. If your peanut butter already has salt, skip the topping salt.

Make a batch on Sunday and you’ll have a ready-to-grab dessert all week. Beats reaching for something you’ll regret.

Use a large chef’s knife and cut straight down in one motion. Don’t saw back and forth or the bars will crumble.

chocolate covered bars cut into rows with one sticking out

Can You Leave These At Room Temperature?

Keep them in the fridge. They’ll hold up at room temperature for a couple hours but start to soften.

Storage

Fridge: up to one week. Freezer: up to 3 months. Wrap individually in parchment for easier grabbing.

These are one of my most-requested low-carb desserts and I think you’ll see why. Great with a glass of cold almond milk.

About the Author
Annie Lampella, Pharm.D.

Annie Lampella, Pharm.D.

Annie is a Doctor of Pharmacy, mom, and the recipe creator behind KetoFocus. With a B.S. in Genetics from UC Davis, she has over 14 years of experience developing family-friendly keto recipes based on the science of human metabolism.

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  1. S
    Sally Jun 10, 2023

    Can you use something besides coconut oil

    1. Annie Lampella
      Annie Lampella Jul 4, 2023

      You can substitute with melted butter.

  2. J
    Jessica Jan 29, 2023

    OMG! These were AMAZING!!!! Really easy to make and the taste is...I have no words. I used crunchy almond butter and sprinkled chopped pecans and sea salt on the chocolate before putting back in the freezer to harden. Thanks so much for the recipe!

  3. J
    Jenn Jun 7, 2022

    Hello, In these Keto PB choc bars, can I substitute something with unflavored whey protein?

    1. Annie Lampella
      Annie Lampella Jun 8, 2022

      I haven't tried it but I would substitute the coconut flour for the protein powder. I think that would still work.

  4. R
    Roberta Sep 8, 2021

    What size of baking dish did you use? How many bars came out with the dose of ingredients stated in the recipe?

    1. Annie Lampella
      Annie Lampella Oct 12, 2021

      I used a square baking dish. Either an 8x8 or 9x9 will work. I cut mine into 12 squares, but you can do 9 and adjust the macros.

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