Keto Peanut Butter Cake Bars

This recipe of keto peanut butter cake bars is full of peanut butter goodness. It’s thick, soft, and chewy in one perfect little keto-friendly treat. 

Years ago, I made a recipe similar to this for my family. Of course, back then, it was one very high-carb-loaded dessert with loads of added sugar.

That high-carb option needed a keto makeover, and these easy low-carb peanut butter bars are the result of wanting that craving satisfied.

Clocking in at only 3 net carbs per serving, it’s a low-carb treat made with healthy fats that is sure to silence your sweet tooth, making it perfect for anyone on a ketogenic diet.

This girl has always enjoyed the flavor of peanut butter, and if it’s slipped inside a cookie, bar, or cake, then I am for sure all in.

If you’re anything like me, you will appreciate the bold peanut flavor in this dessert. 

I love how this makes enough for a large crowd. But fear not, because this recipe freezes beautifully, so you can certainly tuck them away in your freezer when you want to satisfy your peanut butter cravings. 

This is one of those recipes you can serve your entire family. Since these low-carb cake bars are so good, even those not on a keto diet will enjoy them.

Don’t you just love giving your family the healthy treats they will ask for?

I would describe these as a cross between bars and cake. They are not exactly bars, but not exactly cake either; these are more what you would call cake bars.

If what you want is a true cake, then my keto peanut butter bundt cake is one you should check out. 

For a true bar experience, you might try my Keto Peanut Butter Chocolate Chip Bars and my cookies for a Keto Peanut butter cookie recipe that is unmatched. I also have a complete list of Keto Cookies that any cookie lover doing keto would enjoy exploring. 

Check out our keto peanut butter recipes for more delicious keto-friendly peanut butter recipes!

Keto Peanut Butter Cake Bars

Recently, I made a batch of these to have as a dessert option when I had some family drop-ins wanting to test our new ping-pong table. After a few rounds of ping-pong, my niece Melissa asked if I had anything sweet to eat.

To which I quickly responded by pulling out my large pan of keto-friendly peanut butter bars.

Seeing so many non-keto folks around that pan was a tad intimidating, but I thought, what better way to test a recipe than with a group of people who rarely, if ever, have anything ketogenic? 

All I can say is that their ohhhs and awwws proved it was a winning recipe. And that vote of confidence made my day. 

And that’s why this keto recipe made it to the blog.

The best part, like the majority of my low carb desserts, is that they are made with simple ingredients that can be found in most grocery stores these days.

Ingredients Needed To Bake Keto Peanut Butter Bars

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Note that the full printable recipe card and nutritional information are at the bottom of the page.

To make these easy keto peanut butter bars, you’ll need a few basic keto baking ingredients.

My recipe includes creamy natural peanut butter, room-temperature eggs, unsalted butter, almond flour, and a little zero-carb protein powder.

If you do not have any whey protein available, that’s not a problem. Just substitute it for more almond flour. I told you this was a simple recipe.

You can, of course, substitute the peanut butter for your favorite nut butter, like almond butter or even sunflower seed butter, for those who cannot consume peanuts and still have an amazing keto treat. See there? I just gave you more options!

These keto peanut butter cake bars have a rich peanut-y flavor profile thanks to the generous amount of peanut butter.

But make sure that when choosing your peanut butter, it only has peanuts in the ingredients.

I wanted these bars to be moist, and I accomplished this by using both butter and cream cheese in the batter. This peanut butter combo worked beautifully in these low carb peanut butter bars.

As far as what flour to use in the peanut butter mixture, I chose almond flour.

How To Make Keto Peanut  Butter Bars

Making this peanut butter, sugar-free keto recipe is pretty straightforward using these basic steps.

You’ll begin by preheating the oven to 350 degrees and grease a 9X13-inch pan.

Then, in a large bowl, I use an electric mixer to combine the softened butter, sugar substitute, vanilla extract, and cream cheese until it’s well combined and light and fluffy.

I then add the sour cream and peanut butter, followed by adding the eggs one at a time.

After that, I mix in the almond flour, whey protein, baking powder, and salt.

I then spread the batter into the prepared pan. Once you’ve spread the peanut butter mixture in an even layer with a rubber spatula, sprinkle some roasted peanuts over the batter and add some sea salt flakes. 

I bake the mixture at 350 degrees for 40–45 minutes until golden brown and an inserted toothpick comes out clean.

After allowing the bars to cool on a baking rack for 20 minutes, I melt 1/4 cup of peanut butter in the microwave and drizzle it on top.

I let the bars set for another 10 minutes before slicing and then stored any leftovers in an airtight container in the refrigerator for up to 5 days, or you can freeze for up to 3 weeks.

Low Carb Sweeteners

When it comes to choosing which sugar substitute to use for this recipe, I have a few options for you to choose from.

My go-to choice is Lakanto Monk Fruit because it truly is the closest thing to sugar in my book. Not only does it behave like sugar, but there is barely any aftertaste. It is a monk fruit and erythritol blend.

You can choose to use their white granulated or gold option, which produces equally great results in this recipe.

Lakanto Monk Fruit gets its sweetness from antioxidants called mogrosides instead of fructose or sucrose.

That’s why it’s a great all-natural sugar substitute with zero calories and glycemic index.

I’m also partial to  Swerve an erythritol blend. Unlike other natural sweeteners like stevia, it has no bitter aftertaste and measures just like sugar.

It’s also a sugar substitute that browns and caramelizes just like sugar. Swerve is made from ingredients found in select fruits and starchy root vegetables and contains no artificial ingredients, preservatives, or flavors.

Swerve is the name brand of Erythritol. Unlike other sugar alcohols, it has a 0% impact on blood sugar.

You could also use the stevia and erythritol-based brand Pyure for these cake bars. But if using Pyure, you will want to use half the amount called for in this recipe since it’s much sweeter.

Lastly, if you can easily find a more natural sugar substitute, you can also use Splenda with great success.

Other Keto Peanut Butter Recipes

If you’re a peanut butter lover, you must also check out these other keto-friendly recipes.

• Keto Peanut Butter Fat Bombs
• Keto Peanut Butter Swirl Brownies
• Keto Peanut Butter Chocolate Pie
• Keto Peanut Butter Cheesecake
• Keto Peanut Butter Fudge

Tag Us

I sure hope you will give this recipe a try. It’s a great way to enjoy peanut butter while minding your carbs. If you give it a try, make sure you remember to tag us on Instagram, Facebook, and Pinterest. 

It’s what encourages this girl to keep sharing and perfecting her recipes.

Also, check out our Amazon Store for our recommendations. You might be surprised by how many great keto options are at your disposal.

Join Our Jesus And Keto Movement 

Looking for an online support system to help you stay the course on keto? As a family, we came to the keto diet, looking at it from a Christian perspective. As believers, we live our lives supported by God’s grace.

So when the Holy Spirit led us to combine our Christian faith and the keto diet, we did so in hopes of finding lasting transformation. When we followed the Holy Spirit’s prompting, we got on the path to real transformation. 

Knowing firsthand the benefits of this decision, we have created a closed Christian group that is using the keto diet to transform their lives. 

We invite you to join our Private Facebook Group and see if it’s not the key you have been missing.

Be sure to request our FREE Jesus and Keto E-Book (First 7 Days). We hope it blesses you.

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Enjoy early access to recipes on the website before they go live. Plus, bonus recipes that are exclusive to the app. Make your own personal cookbooks that you can use to organize your favorite recipes.

Search recipes by title, ingredients, keywords, and categories, and of course, every recipe shows complete nutritional facts.  Get the Fit to Serve Group App for easy-to-follow keto recipes made with easy-to-source ingredients. 

The app is loaded with hundreds of yummy recipes for breakfast, lunch, dinner, snacks, and even desserts!

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