Chocolate Marshmallow Whoopie Pies

The first time I encountered whoopie pies, I was visiting my aunt in Maine during a sticky August heatwave. She pulled these chocolate sandwich cookies from her refrigerator, and I was baffled by the name. One bite into that fluffy marshmallow filling and I stopped caring about what they were called and started caring about when I could have another one.

I brought a batch to a potluck last winter, and people kept asking where I bought them. When I said I made them that morning, someone literally gasped. The best part was watching kids and adults both reach for seconds, faces smeared with marshmallow fluff.

Ingredients

• 2 cups all-purpose flour: This foundation gives the cookies structure while keeping them tender, so do not pack it down when measuring
• 1/2 cup unsweetened cocoa powder: Dutch processed gives a deeper flavor, but regular works perfectly fine too
• 1 teaspoon baking soda: This is what makes the cookies puff up into those signature domed shapes
• 1/2 teaspoon salt: A small amount balances all the sugar and enhances the chocolate flavor
• 1 cup granulated sugar: The sweetness that balances the dark chocolate and creates that perfect cookie texture
• 1/2 cup unsalted butter, softened: Room temperature butter is non negotiable here, it creates the right texture
• 1 large egg: Bind everything together and adds richness to the cookie crumb
• 1 cup buttermilk: The secret ingredient that makes these impossibly soft and gives them a slight tang
• 1 teaspoon vanilla extract: Pure vanilla makes everything taste better, do not skimp here
• 1/2 cup unsalted butter, softened: For the filling, this needs to be properly softened to achieve that fluffy texture
• 1 1/4 cups powdered sugar: This sweetens the filling while keeping it smooth and creamy
• 1 jar marshmallow creme: The star of the filling, make sure it is fresh for the best fluffiness
• 1 teaspoon vanilla extract: A second dose of vanilla to perfume the sweet filling
• Pinch of salt: Just enough to cut through all that sugar and butter

Instructions

Get your oven ready:

Preheat to 350 degrees and line two baking sheets with parchment paper, this prevents sticking and makes cleanup effortless

Whisk the dry ingredients:

In a medium bowl, combine the flour, cocoa powder, baking soda, and salt until everything is evenly distributed

Cream the butter and sugar:

Beat them together for about two minutes until the mixture looks pale and fluffy, this step is worth the extra time

Add the egg:

Beat it in until completely incorporated, scraping down the sides of the bowl to make sure nothing is left behind

Pour in the liquids:

Mix in the buttermilk and vanilla, and do not panic if it looks curdled or separated because that is totally normal

Combine everything:

Gradually add the dry ingredients to the wet, mixing only until just combined because overmixing makes tough cookies

Scoop the batter:

Drop rounds about two tablespoons each onto the prepared sheets, leaving two inches between them for spreading

Bake to perfection:

Bake for ten to twelve minutes until the tops spring back when pressed gently, then cool completely on a wire rack

Make the filling:

Beat the butter until creamy, add powdered sugar until smooth, then mix in marshmallow creme, vanilla, and salt until fluffy

Assemble the pies:

Spread filling onto half the cookies and top with the remaining ones, creating the classic sandwich

Pin

My neighbor texted me at 10 PM after I left some on her porch, saying she ate three while standing in her kitchen. Apparently her husband found the empty container and thought she had hid them from him on purpose.

Making Them Your Own

I have discovered that peppermint extract in the filling transforms these into a winter holiday treat people beg for. Rolling the edges in mini chocolate chips adds texture and makes them look fancier than they really are.

The Buttermilk Secret

If you do not have buttermilk, mix one cup of milk with one tablespoon of lemon juice or vinegar and let it sit for five minutes. I have done this dozens of times and cannot tell the difference in the final result.

Storage And Freezing

These actually taste better the next day when the flavors have had time to mingle. They freeze beautifully without the filling, so I often bake a double batch and freeze half for unexpected guests.

• Store assembled pies in an airtight container for up to three days at room temperature
• Freeze unfilled cookies for up to three months, thawing completely before filling
• The filling can be made ahead and refrigerated for two days, then brought to room temperature before using

Pin

Every time I make these, I am transported back to that Maine kitchen, watching my aunt laugh at marshmallow on my chin. Some desserts are just meant to be messy.

Recipe FAQs

→ What makes whoopie pies different from regular cookies?

Whoopie pies feature a soft, cake-like texture rather than the crisp consistency of traditional cookies. The chocolate rounds are specifically designed to be sandwiched together with filling, creating a handheld dessert that bridges the gap between cookie and cake.

→ How should I store whoopie pies?

Store assembled whoopie pies in an airtight container at room temperature for up to three days. The filling helps keep the cookies soft and moist. For longer storage, freeze unfilled cookies and thaw before assembling with fresh filling.

→ Can I make the filling ahead of time?

Yes, the marshmallow filling can be prepared up to two days in advance and stored in the refrigerator. Bring it to room temperature and give it a quick whip before spreading onto the cookies for the best texture and easy application.

→ What can I use if I don't have buttermilk?

Combine one cup of regular milk with one tablespoon of lemon juice or white vinegar. Let the mixture stand for five minutes until it thickens and curdles slightly. This homemade substitute provides the necessary acidity and tenderness to the chocolate cookies.

→ How do I know when the cookies are done baking?

The whoopie pie cookies are finished when the tops spring back when gently pressed with your finger, similar to testing a cake. They should appear set but still moist, typically taking 10-12 minutes at 350°F. Overbaking will result in dry, crumbly cookies.

→ Can I customize the marshmallow filling?

Absolutely. Add peppermint extract for a holiday variation, fold in mini chocolate chips or sprinkles, or substitute the vanilla with almond extract. You can also roll the assembled edges in crushed nuts, coconut, or decorative sprinkles for added texture and visual appeal.