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Easy Chocolate Whoopie Pies with Peanut Butter Marshmallow Filling

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 Whip up soft chocolate whoopie pies with the help of a cake mix, then fill them with a tasty peanut butter marshmallow filling for an extra memorable treat!

hand holding large chocolate whoopie pie with peanut butter marshmallow filling

      Homemade whoopie pies are the perfect mix of cookie, cake and frosting. This recipe uses the shortcut of a cake mix, so they are super simple to make. The filling has bold peanut butter flavor with the marshmallow undertones you would expect in a classic whoopie pie. The end result is a fun hand held treat that is sure to wow.

     Have you ever had a whoopie pie? The soft cake-like cookies sandwich a creamy marshmallow filling for a tasty dessert sandwich. 

      They are the official state treat of Maine and a Pennsylvania Amish tradition. For good reason too, they are super delicious. 

stack of chocolate cakey whoopie pies with peanut butter filling

      Each bite is like a mash up of some of our favorite desserts. They are part cake, part cookie and of course that sweet filling draws you in.

      Luckily with the help of a cake mix, you can whip up a batch with almost no effort at all. Plus that make changing out the flavor profile super simple. 

        I will highlight some tasty whoopie pie flavor ideas below to get your creative juices flowing. If you try some, let me know how it goes.

      But if you are a chocolate and peanut butter fan, you have to start with this recipe as written. They are super delicious and the
hefty amount of peanut butter helps keep these whoopie pies from tasting too sweet.

swirls of peanut butter marshmallow filling on flat side of whoopie pie cake mounds

Tips for baking your whoopie pies

Because you start with a cake mix, the batter comes together really quickly. Just make sure your butter is softened so everything incorporates nicely.

The batter should be like a thick cake batter or slightly loose cookie dough. It’s a little bit sticky but should be able to mostly hold its shape.

scoops of chocolate whoopie pie batter on cookie sheet

Using a cookie scoop is a great way to evenly portion the dough while also giving them a nice round shape. I used a medium cookie scoop for these and the resulting whoopie pies were relatively large.

You can use a small cookie scoop to get twice as many smaller treats. Which is better will totally depend on how you plan to serve them.

To get the best thick, soft, cake like cookie you will want to refrigerate the scoops of dough for about a half hour. That will give you nice rounded domes and cakey interiors.

Let them cool completely and add your filling. It really is that easy!

freshly baked cake like whoopie pie circles on baking sheet

The filling 

Whoopie pies traditionally have a marshmallow-y filling, so I wanted to keep the tradition alive in these. But of course I wanted to do something a little different as well.

Adding peanut butter was a perfect solution! The peanut butter brings that little bit of salty savory and pairs wonderfully with the chocolate. 

putting chocolate whoopie pie cookie top on peanut butter filling

If peanut butter isn’t your jam, marshmallow fluff buttercream would be a fabulous option. Or use a simple vanilla American buttercream

Once the cookies have cooled, you can spread, pipe or scoop the filling on on and top it with another. Frosting fanatics, feel free to be generous with that filling! 

Use this cake mix whoopie pie recipe to make these fun flavor combinations 

You can easily use this base recipe and switch out the cake mix you use to make an endless variety of whoopie pie flavor combinations. In fact, it would be fun to do a display of different types as a fun dessert spread at a party.

If you decide to do more than one flavor, just be sure to make the smaller versions. People are definitely going to want to try more than one!

plate full of large rounded chocolate whoopie pies with peanut butter filling

Lemon lovers can use a lemon cake mix to make fun citrusy whoopie pies. Some lemon sweetened condensed milk buttercream would be a fabulous filling. Or make lemon blueberry whoopie pies for an extra summery treat!

Use funfetti cake mix and fluffy sweetened condensed milk buttercream for birthday whoopie pies.

Or use a butter recipe vanilla cake mix and chocolate sweetened condensed milk buttercream for an inside out whoopie pie. 

A red velvet, carrot cake or spice cake mix would pair wonderfully with decorator’s cream cheese frosting.

See the possibilities really are endless! 

loaf pan with 5 large whoopie pies in in

Cookies for Kids Cancer 

Today’s post is about more than just delicious treats. It is part of a
fundraising and awareness campaign I like to do each year with some of my fellow bloggers.

Cookies for Kids Cancer is a wonderful organization that helps to raise awareness and research dollars for pediatric cancer. It was founded and is run by pediatric cancer parents and uses experts in the field to help direct the money that is raised to where it will do the most good.

After having a close look at the shortcomings of the current pediatric cancer treatments, it is a cause I am really happy to help. Our smallest cancer warriors deserve better treatments with fewer long term side effects.

In conjunction with this post, I have donated $100 to Cookies for Kids Cancer. Our generous partners, Mediavine, OXO and Imperial Sugar have agreed to match the donation making it $400.

Every cent counts and these kids deserve more. If you would like to donate to Cookies for Kids as part of this campaign, feel free to click this link and give what you can. 

While you are there, you can learn more about their mission. You can also sign up to host a bake sale, send cookies or any variety of fun ways to help.

good cookie logo for cookies for kids cancer fundraiser

More cookies for kids recipes

Maple cinnamon cookies are kissed with the warmth of maple and brown sugar and a hint of cinnamon. They are big and chewy and oh so good!

Super soft sugar cookie bars topped with a fluffy layer buttercream are a fun and easy treat. They are so much quicker to make than individual cookies and taste great!

Make simple chocolate spritz cookies extraordinary by sandwiching a layer of rich ganache style frosting between them.

Chewy delicious M&M cookies are studded with chocolate chips and sprinkles making them perfect for a party. Pick whatever color candies you’d like and the cookies are instantly dressed up for any holiday.

Chewy brown sugary blondies loaded with chocolate chunks, caramel undertones and topped with M&Ms. This big batch of bars is perfect for a party, carry-in or just because.

Yield: 12 Large Whoopie Pies

Easy Chocolate Whoopie Pies with Peanut Butter Marshmallow Filling

stack of chocolate cakey whoopie pies with peanut butter filling

 Whip up soft chocolate whoopie pies with the help of a cake mix, then fill them with a tasty peanut butter marshmallow filling for an extra memorable treat!

Prep Time 20 minutes
Cook Time 15 minutes
Additional Time 30 minutes
Total Time 1 hour 5 minutes

Ingredients

Cake Mix Whoopie Pies

  • 1 (15.25 oz) chocolate cake mix
  • 1/2 cup butter softened
  • 3 eggs
  • 1/4 cup sour cream

Peanut Butter Marshmallow Filling

  • 1.5 cups creamy peanut butter
  • 7 oz marshmallow fluff
  • 1 cup powdered sugar
  • 1-2 Tablespoons milk

Instructions

Whoopie Pies

  1. Line 2 baking sheets with parchment paper or a silicone mat and set aside.
  2. Beat butter until smooth and creamy. 
  3. Add cake mix, eggs and sour cream.  Mix until just combined.
  4. Use medium cookie scoop to put 12 cookies on each baking tray, leaving at least 2 inches between each scoop of dough.
  5. Chill scoops for at least 30 minutes.
  6. Preheat oven to 350° F and bake chilled cookie scoops for 11-12 minutes. 
  7. Cool on the baking sheet for 2 minutes, then move to a wire rack to cool completely.

Filling

  1. Mix together peanut butter and marshmallow fluff until combined.
  2. Stir in powdered sugar.
  3. Add enough milk to get it to your desired consistency.
  4. Pipe, spread or put a scoop of frosting on half of the whoopie pies. Top with a second whoopie pie to form a sandwich.
  5. Store your whoopie pies in an airtight container on the counter or in the refrigerator for up to 5 days. For longer storage, wrap individually and freeze. 

Notes

For smaller whoopie pies, use a small cookie scoop to portion batter. You should get about 48 scoops. Chill the batter like above, but bake for 9-10 minutes.

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Nutrition Information:

Yield:

12

Serving Size:

1

Amount Per Serving: Calories: 310Total Fat: 20gSaturated Fat: 7gTrans Fat: 0gUnsaturated Fat: 13gCholesterol: 70mgSodium: 566mgCarbohydrates: 30gFiber: 2gSugar: 21gProtein: 11g

All nutritional information is estimated and will depend on the exact ingredients you use.

Did you make this recipe?

I'd love to see it! Share a picture on Instagram or Pinterest and tag me @carleecooks to let me know how it went!

Homemade whoopie pies are the perfect mix of cookie, cake and frosting. This recipe uses the shortcut of a cake mix, so they are super simple to make. The filling has bold peanut butter flavor with the marshmallow undertones you would expect in a classic whoopie pie. The end result is a fun hand held treat that is sure to wow.

Share with your friends!

Carlee

Friday 12th of February 2021

Thank you!

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