Easy no bake keto chocolate peanut butter bars are a simple yet decadent low-carb treat. Enjoy them as a keto dessert, fat bomb, or snack. They taste just like peanut butter cup candies!
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Keto Peanut Butter Chocolate Bars
Are you a lover of all things peanut butter? I certainly am. And it doesn’t get much better than the flavor of yummy peanut butter coated in chocolate.
This is a modification of a low carb peanut butter fudge recipe I used to make. Although I liked the fudge, I thought the Splenda in it made it too sweet and it was a bit plain. What it really needed was a layer of chocolate on top!
For this easy keto peanut butter cups recipe, I changed the sweetener to a mixture of monk fruit and erythritol which tones down the sweetness. I also spread melted chocolate on top.
The added layer of chocolate makes these keto peanut butter bars taste just like a Reese’s Peanut Butter Cup! Plus, I think these squares would taste amazing cut up and blended into low carb vanilla ice cream – a homemade low carb DQ Blizzard.
Easy steps for making keto peanut butter bars
- For the peanut butter layer, mix butter, collagen peptide, powdered sweetener, and peanut butter in a large bowl.
- Spread the peanut butter into a pan with parchment paper.
- Melt chocolate chips with a couple tablespoons of peanut butter.
- Smooth the chocolate layer over the peanut butter mixture.
- Place in the refrigerator to chill for at least 30 minutes.
Once chilled, the keto low carb treat is ready to cut into bars! It’s best to use a long sharp knife to cut them into even squares.
Recipe Inspiration
These gluten free peanut butter bars were inspired by a recipe that I learned how to make in middle school Home Economics class. That recipe mixed graham cracker crumbs into the peanut butter mixture as well as regular powdered sugar.
This version of easy to make low carb peanut butter chocolate bars brought back memories. It was so fun back in those days as a young teenager learning how to make food with friends.
In fact, I still have the handwritten note that my classmate gave me for the original bar recipe we made together in 8th grade. I loved the recipe so much, I kept it in an old Better Homes and Gardens cookbook that my mother handed down to me.
It’s great to be able to enjoy the same taste in a much healthier version of the no bake peanut butter bars.
Is peanut butter OK for keto diet?
Natural unsweetened peanut butter has about 4 grams of net carbs along with 16 grams of fat per 2 tablespoon serving. That makes it a low carb food that’s ideal for a ketogenic diet. However, some choose to avoid it because it often contains the mold aflatoxin.
Other sweets to enjoy on keto
If you are still having trouble with a sweet tooth on a restricted low carb diet, give some of these other sweet recipes a try:
- Keto Brownie Cheesecake
- Dark Chocolate Keto Fudge
- Chocolate Peanut Butter Fat Bombs
- Chocolate Chip Keto Blondies
And if you need some other ideas, be sure to check out all my low carb desserts!
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📖 Recipe
Keto Chocolate Peanut Butter Bars
Video
Ingredients
- ½ cup butter melted
- ⅔ cup collagen peptides or unflavored whey protein powder
- ¾ cup Lakanto powdered monk fruit sweetener
- ½ cup natural sugar-free peanut butter
Topping:
- ¾ cup sugar-free chocolate chips
- 2 Tablespoons peanut butter
Instructions
- Line an 11×7 baking dish with waxed paper.
- In medium bowl, mix the butter, collagen peptides, powdered sweetener, and peanut butter together. Spread mixture in the bottom of prepared pan.
- In Pyrex or metal bowl over pot of simmering water, melt chocolate chips with the peanut butter, stirring until smooth. Pour melted chocolate over peanut butter mixture and spread evenly to cover top.
- Refrigerate for at least an hour before cutting into squares. Keep in the refrigerator for snacking.
Notes
Low Carb Sweeteners | Keto Sweetener Conversion Chart
Nutrition
Additional Info
Note on Nutritional Information
Nutritional information for the recipe is provided as a courtesy and is approximate only. We cannot guarantee the accuracy of the nutritional information given for any recipe on this site. Erythritol carbs are not included in carb counts as it has been shown not to impact blood sugar. Net carbs are the total carbs minus fiber.
Unauthorized use of this material without written permission from Lisa MarcAurele is strictly prohibited unless for personal offline purposes.
Single photos may be used, provided that full credit is given to LowCarbYum.com along with a link back to the original content.
Linda M. Barnes
You say you prefer to use collagen peptides instead of whey, does that carry across to any recipe using whey?
Lisa MarcAurele
I only prefer collagen because it’s dairy-free and has some beneficial qualities.
Jennifer
I have a type that I think i found. I printed this recipe out a few years back and it had 2/3 cup of collagen or whey protein which worked really good. Now that has changed, and at first when I went to find the recipe on Pinterest instead of looking in my folder, I couldn’t figure out why it wasn’t coming together properly. I got my old printed copy out and noticed the difference. I just thought I should tell you as it does work much better with the 2/3 cup than only the 1/3 cup.
Lisa MarcAurele
Thanks! I’m not sure why that changed.
Linda
These keto chocolate peanut butter bars are fantastic! One of my favorite keto snack s for sure. To me they taste just like Reese’s peanut butter eggs. So easy to make too! I used PB2 peanut butter powder instead of the whey powder. They turned out beautifully. Kudos!
Julie Naulls
I made these bars yesterday because I was craving something sweet. They are so GOOD. Even my husband, who really doesn’t have a sweet tooth (lucky Guy, I guess) likes them. So now I have competition for this yummy treat! I also like the fact it has the protein in each piece. I used primarily Bocha Sweet and Erythritol as my sweeteners, because I can’t get the brand suggested (Canadian). Bocha Sweet is hard to buy, it’s no longer on Amazon.ca, but can be bought directly through the company, situated in Saskatchewan under http://www.Sweetandsprouted.com . It is a wonderful sweetener with no aftertaste at all and zero net carbs. For the U.S. , it might be available on amazon.com.What a wonderful recipe, Thanks, Lisa. I can’t wait till your new cookbook arrives!
Lisa MarcAurele
Thanks for the not on where to get that hard to find sweetener in Canada!
Anita Campbell
Sounds great. Where do you get sugar-free Peanut butter? I haven’t been able to find any.
Lisa MarcAurele
It’s usually labeled as “Natural” but you need to double check the ingredients to make sure it’s only “Peanuts” or just “Peanuts and Salt”. Most grocery stores will carry unsweetened peanut butter which is what you are looking for.
Mal Edie
Can you use almond butter instead of peanut butter?
Lisa MarcAurele
I’ve used almond butter instead of peanut butter. It works just fine.
Byenia
Made this today and am really enjoying it. Tastes like a Reese’s butter cup, only healthier. I did decide to omit the added sweeteners since my vanilla protein powder tasted sweet enough. In their place, I added approximately 1/3 cup of peanut powder instead. Then used a combo of stevia-sweetened extra dark chocolate and Ghirardelli dark chocolate chips mixed w/natural peanut butter for the topping. Will be making this again. 🙂 Thanks!
Lorri
Made these last night. Excellent taste and texture. I didn’t have vanilla protein powder so I substituted with Quest Peanut Butter Protein Powder. I also used chunky natural peanut butter. I found it to be a bit too sweet (maybe because the chunky has less butter because of the nut pieces? So I added another 1/2 cup of the chunky peanut butter .) Perfection! Maybe if using chunky peanut butter you need more? I did! 😉 Thank you for this yummy recipe!
Lisa
I use an unflavored and unsweetened protein powder. If you use a sweetened one, you’ll need less sweetener.