Low Carb Peanut Butter Whoopie Pies are your childhood dreams come true. Let’s make some delicious whoopie!

Peanut Butter Whoopie Pies are the best of two our favorite recipes. The Keto culinary union of our Low Carb Peanut Butter Cookies and Low Carb Cream Cheese frosting.
If you LOVE all things peanut butter like we do, you will definitely love these low carb whoopie pies. I mean, the purpose of whoopie pies is to delight.
These do not disappoint.
Perfect for a family get-together or just a long week that needs an infusion of peanut buttery happiness. I’m not sure we could keep these to ourselves even if we tried, but you’re welcome to try.

HOW MANY NET CARBS IN EACH PEANUT BUTTER WHOOPIE PIE?
6 Net Carbs per peanut butter whoopie. This includes about 1.5 Tablespoons of our keto cream cheese frosting in the center.
If you’d like to make the carb count lower or the treat smaller, we have some recommendations for that. This is personally my preference with these, they are slightly too big for my liking but the family loves them like this size.
CUTTING NET CARBS EVEN MORE – So my next step is to cut the recipe into 24 peanut butter cookies, so we’ll have around 12 whoopies instead of the 6 the original recipe makes. Smaller portions that are still satisfying … we’ll see if anyone in the family decides to riot because of it. 😉
There is 34 grams of sugar alcohol in each whoopie. If you’d like to use another form of sugar alcohol be sure to check out our low carb sweetener conversion chart. Our family does subtract the sugar alcohols and we’ll continue to provide that sugar alcohol grams above the nutrition card below and you can decide for yourself if you want to follow that. ?
If you are new to this Low Carb/Keto lifestyle and are unsure what we are talking about please feel free to read up more on Net Carbs.

If you’re ready to get down to business, here’s what you’ll need to make the magic happen:
- For the cookies: Creamy peanut butter, erythritol, egg, salt, vanilla extract.
- For the frosting: Cream cheese, butter, powdered erythritol.
A little bit(e) of history
Whoopie pies are considered one of the ultimate comfort foods, they also are sometimes called gobs. (As in, gobs of delicious filling.)
Believe it or not, the origin of Whoopie Pies is highly debated and still a bit of a mystery. Maine and Pennsylvania have been at odds for decades over the delicious frosting filled treats.
Sometimes we don’t need to fully understand where something came from in order to appreciate where it is going.
Right in our bellies. Yummm!
We know you’re going to love these Peanut Butter Whoopie Pies, whether you go with the big versions or the smaller portions.
P.S. – We also LOVE our low-carb chocolate frosting which brings a different flavor to the table. Peanut butter and chocolate is on-point for the flavor of happiness.
Get ready to bake, dollop and delight your taste buds. Just don’t forget to save one for us. 😉

SOME other Low Carb Desserts You might enjoy:

Low Carb Peanut Butter Whoopie Pies
Ingredients
Peanut Butter Cookies
- 1 cup creamy peanut butter
- 1/2 cup erythritol
- 1 teaspoon pure vanilla extract
- 1 large whole egg
- 1/4 teaspoon salt
Cream Cheese Frosting
- 8 ounces cream cheese , softened
- 1/4 cup butter , softened
- 2 cups powdered erythritol (or another powdered sweetener of your choice)
- low carb cream cheese frosting
Instructions
- Mix all ingredients together in a medium mixing bowl.
- Divide the resulting dough into 12 equal portions (a little larger than a walnut) and place on a baking sheet.
- Using a fork, press the cookie to about 1/3 inch thickness.
- Bake at 350 for 18-20 minutes.
- Cool completely before serving as they fall apart when still warm.
- Meanwhile cookies are cooling, prepare frosting. Take a medium mixing bowl and using a hand mixer beat together cream cheese and butter. Slowly add powdered sweetener in until creamy.
- Pipe frosting onto bottom of one peanut butter cookie and top with another peanut butter cookie. Continue until all whoopie pies are made. Makes 6 whoopie pies.
Notes
Please note that the nutrition data below is provided as a courtesy. We try to be accurate with this information but feel free to make your own calculations.Â


Just wondering how a cookie with 40 net carbs is considered low carb. I was interested in making them until I read the macros. Is it because you use peanut butter with sugar? Please explain, thank you.
We subtract sugar alcohols and they are 0Net Carb. Not everyone reacts to sugar alcohols the same though so we add them into the nutrition card properly in case someone needs to do their own calculations. If you are not familiar with how to read a nutrition card for the carb count this is a great post to start. Our Low Carb 101 page and How to Calculate Net Carbs.
Can I replace the peanut butter with almond butter?
Depends if your almond butter is smooth.. if it’s pretty smooth I can see that it should work well. 🙂
If you make them smaller does it change the net carbs?
Yep! I believe we mentioned this in the post as well below in our How Many Net Carbs paragraph.
I love soft cookies and the cookies in the pictures show they look kinda burnt on the bottoms. Can you undercook them? Going to try them anyway..they look fabulous.
Hi Diane! So we recently moved and have been figuring out our new oven when these were shot. This peanut butter cookie recipe has been tested NUMEROUS times though in our stable previous oven. So please follow the baking instruction times as yes if you underbake them they are already a pretty delicate cookie and will make them even more so.
They do look burnt I think I would have taken a better pic for the recipe.
We aren’t perfect. ?â€â™€ï¸ Nor is that something I’d like to represent here honestly. We try our best to create delicious dishes for our family and share with this community. We are nowhere near perfect and sometimes if it’s still tasty but looks disgusting (I think this keto syrup is disgusting looking but delicious lol) or a perhaps a little burnt while we figure out a new oven.. well thats life right? Real life and real kitchen. <3
Over baked or crunchy , slightly burnt peanut butter cookies are the BEST! Lol that’s how I like them. I can’t stand undercooked peanut butter cookies. I think your pic looks perfect! Golden brown!
I totally agree that your picture is great. If you made them undercooked if that’s how you like them people would complain as well. Can’t please everyone and on social media everyone is ready to pounce on you. Keep doing what your donning!!! ?
Hi thanks so much for the recipe it was good the frosting was so delicious I was licking it from the bowl as I was making it lol the only thing I want to do next time is make my cookie a tad more sweeter I used monkfruit instead if the required sweetner and I should have added a little more but it still came out good ? Do you have any advice when using swerve or monkfruit instead ??
So glad you enjoyed it! It really depends on your sweetness likeness though. Swerve and monkfruit actually have a really good 1-1 ratio.. we in general try to use a low amount of sugar alcohols sweeteners as much as possible so if you’ve got a little bit extra sweet tooth it might not be a bad idea to add an additional 1/4 cup of sweetener for our recipes. We’ve worked on lowering our sweetness cravings and it’s really a REAL thing to adapt after a while. Like drinking black coffee for example.. never thought that would happen until it happened and now I prefer it that way LOL
This is great to hear. I find that most sweet treats are too sweet for my current taste. It has changed so much.. I had a grapefruit today and it tasted as sweet as oranges used to. Unsweetened cranberry juice is also really a wonderful sweet treat now. I will be trying your recipes.
You stated above in the ingredients “creamy peanut butterâ€. What brand do you use since most creamy peanut butters contain added sugar. Not good for a keto diet. Thanks!
We actually have been making our own for a while now (recipe for it) BUT I can strongly suggest WholeFoods No Sugar Added Creamy Peanut Butter if you want to just purchase it… But really any creamy peanut butter.. meaning no sugar added creamy peanut butter lol not crunchy. 🙂
Made these cookies and they are great. Frosting could have been cut in half. Had more then necessary. However all in all this is a keeper recipe. Loved it.
Hi Jackie!
Yes, we apologize. We thought we made a note of that in the post itself but looks like we forgot to do that! You can freeze the leftover frosting for another time OR use it to top some delicious chocolate cupcakes we link to in the post.. 🙂
These look so good. I love anything peanut butter. Why is the carb count so high? Is that a typo?
What you are seeing is the carb count WITHOUT subtracting sugar alcohols. Majority of people subtract sugar alcohols AND fiber to get their net carbs. We don’t have a way to add sugar alcohols into the nutrition label so we’ve got to add it separately and it will always be above the nutrition label in the recipe notes.. We don’t want to subtract the sugar alcohols from the carbs automatically as some don’t react to sugar alcohols the same and have partial sugar spikes with diabetes so to us it’s important to clearly label the best we can so we can help with all the reasons to be on this diet. ? If you are new carb counting and need a little more info and an idea about calculating net carbs check out this post – What are net carbs?
Thanks for sharing! Do they keep long?
We found they keep at least a week. That’s how long they lasted in our house at least. Since there is cream cheese in the frosting though I was a bit paranoid and refrigerated them after a few days since its so warm in our house with the summer. Hope this helps! 🙂
This looks so good! Do you use this filling recipe for any other desserts?
We do! It’s whats used in all our cupcakes and cakes. 🙂
These look so good, I am definitely making these! I would like to know first if I should expect a crunchy cookie or soft cookie?
Thank you for your time!
Kind of in the middle lol they aren’t soft pillowy cookies but they 100% are not super crunchy cookies either.. I actually hate super crunchy cookies lol