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Peanut Butter Whoopie Pies

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4.93 from 14 votes
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Keto Peanut Butter Whoopie Pies. Two tender cakey cookies sandwiched with peanut butter buttercream frosting. These are so good you will never be able to tell they are healthy. This easy whoopie pie recipe is low carb, keto, gluten-free, grain-free, sugar-free, and Trim Healthy Mama friendly.
plate of two peanut butter whoopie pies leaning on each otherPin

I grew up visiting the Pennsylvania Dutch Country as a child. Whoopie Pies are a classic dessert among the Pennsylvania Amish. They’ve become more popular in recent years and I’ve seen them pop up all over the place.

Last night I went out to dinner with a few of my girlfriends from college. I had some of these Peanut Butter Whoopie Pies waiting in the car in a lunch bag with ice packs. After dinner, we moseyed over to Starbucks for coffee and I whipped out my whoopie pies for dessert. A chorus of “Tar, these are really good!” ensued. I may have blushed a little.

hand holding peanut butter whoopie piePin

What is a Whoopie Pie?

The official definition is “a dessert or snack made from two soft cookies, typically chocolate, with a creamy filling sandwiched in between.”

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I skipped over the traditional chocolate version and went straight to peanut butter. And I don’t regret it one bit.

“Pennsylvania, Maine, Massachusetts, Virginia and New Hampshire all claim to be the birthplace of the whoopie pie.” – Wikipedia

Wherever they came from they are delicious. The first whoopie pie I clearly remember eating was in New Hampshire at a cute little country store while visiting my husband’s aunt. That was chocolate with marshmallow filling. Yum!

cookie batter for peanut butter whoppie pies in mixing bowl with ice cream scoop

How to Make a Whoopie Pie?

Whoopie Pies are very easy to make. They are made from a thick, cakey batter that produces big soft cookies. My trick is using a cookie scoop to keep them a uniform size. This makes finding a pair that match much easier. Once you mix up the batter, just scoop the cookies and bake.

Next, mix up the filling. Cool the cookies, add some filling, and give them a top. Done!

peanut butter cakey sandwich cookies on cookie pan

Whoopie Pie Ingredients: 

  1. butter
  2. sugar-free sweetener
  3. peanut butter powder
  4. coconut flour
  5. egg
  6. almond milk
  7. sour cream
  8. vanilla
  9. baking powder
  10. baking soda
  11. salt

cookie sheet filled with sandwich cookies with half sandwich cookies topped with peanut butter whoopie pie filling

Peanut Butter Buttercream Ingredients: 

  1. butter
  2. cream cheese
  3. sugar-free sweetener
  4. peanut butter powder
  5. vanilla

peanute butter whoppie pies arranged in two rows close upPin

Love Peanut Butter everything? Here are some more Low Carb Peanut Butter Desserts!

Keto Peanut Butter Balls

Peanut Butter Cup Cookies

Keto Peanut Butter Ice Cream

Keto No Bake Peanut Butter Cheesecake

Want a peanut butter fix even faster? Try this 3 Minute Keto Peanut Butter Mug Cake!

And my Chocolate Whoopie Pies are a must for any whoopie pie fan.

close up on peanut butter whoopie piesPin

 

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plate of two peanut butter whoopie pies leaning on each other

Peanut Butter Whoopie Pies

Taryn Scarfone
Keto Peanut Butter Whoopie Pies. Two tender cakey cookies sandwiched with peanut butter buttercream frosting. These are so good you will never be able to tell they are low carb or grain free. 
4.93 from 14 votes
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Course Dessert
Cuisine American
Servings 8 large whoopie pies
Calories 319

Ingredients
 
 

Whoopie Pie Ingredients:

Peanut Butter Buttercream Ingredients:

Instructions
 

  • Preheat oven to 350.
  • Cream together the butter and sweetener with an electric mixer. Add in the rest of the ingredients and mix until smooth. Using a large cookie scoop drop 16 blobs of dough onto parchment lined baking sheets. Bake for 25-27 minutes until the whoopie pies feel firm to the touch and spring back when lightly pressed. Cool completely.
  • While they are cooling you can make the filling. Cream together the butter, cream cheese, and sweetener. Mix in the peanut butter powder and vanilla until smooth.
  • To fill the whoopie pies flip half of them upside down. Spoon or pipe the frosting evenly between them. Top with a second cookie. Store in the fridge.

Notes

Notes on Sweeteners: 
I use my own blend of xylitol, erythritol, and stevia in my recipes. This is twice as sweet as sugar. It is comparable to Trim Healthy Mama Gentle Sweet and Truvia.
To sub in Swerve or Lakanto Monk Fruit use 1.5 times the amount of sweetener called for. 
 
To sub in Pyure or Trim Healthy Mama Super Sweet use half the amount of sweetener called for.
 
Substitutions will work in most recipes. They may not work in candies, such as caramel.
 
 

Nutrition

Calories: 319Carbohydrates: 8gProtein: 7gFat: 28gSaturated Fat: 7gCholesterol: 31mgSodium: 645mgPotassium: 221mgFiber: 4gSugar: 1gVitamin A: 165IUVitamin C: 0.2mgCalcium: 81mgIron: 0.6mg
Love this recipe?Please leave a 5 star rating!

I couldn’t resist sharing a pic of my little finger licker at the bottom of this post. 💖

child sitting and using finger to eat some peanut butter whoopie pie fillingPin

 

Originally Published September 21, 2016. Revised and Republished March 15, 2019.

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66 Comments

  1. I used the chocolate Keto Whoopie pie recipe and used the Peanut Butter Filling from this recipe and OH WERE THEY GOOD!!….Thought I had better clarify my previous comment for you! I have also made both recipes with their original fillings and liked them both, but just HAD to use Chocolate Whoopie Pies with Peanut Butter filling.5 stars

  2. The whoopie pies turned out great, and my favorite part of them was the peanut butter filling!! To die for!!! Thanks for sharing. I used “your sugar” because it is my all-time favorite sugar substitute. Thanks again for ANOTHER GREAT RECIPE!!5 stars

    1. I want to try this recipe , I am a little confused about the the peanut butter flour in the recipe but in what you will need is peanut butter powder.

  3. Are they supposed to spread during cooking or am I supposed to flatten them? Mine stayed in n the shape of my cookie scoop!

  4. If I just used Stevia what would the amount needed be? Same as listed in recipe? Newbie here so just learning the ropes!

    1. Which stevia do you have? A stevia extract powder (the super-concentrated ones that come with a teeny tiny spoon) will not work. But a blend like truvia could.

  5. Delicious. Not too sweet. Used your sweetener for the cookie and swerve confectioners for the filling. Next time maybe I would add a few crushed peanuts for some crunch.5 stars

    1. I have not tested this with peanut butter so I’m not sure that would work. Most grocery stores do carry peanut butter powder or peanut butter flour. It goes by both names.

      1. Question. Above where you list the ingredients you list Peanut butter powder, down below in the recipe peanut butter powder is not listed but peanut flour is, which one is it? PB2 or Peanut flour? Can’t wait to try these!!

      2. They are similar and interchangeable. Different brands label differently. The brand PB2 does have added sugar so that isn’t the best choice. .

4.93 from 14 votes (6 ratings without comment)

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