Chocolate Marshmallow Whoopie Pies (Printer-friendly)
Soft chocolate sandwich cookies with fluffy marshmallow filling
# What You'll Need:
→ Chocolate Cookies
01 - 2 cups all-purpose flour
02 - 1/2 cup unsweetened cocoa powder
03 - 1 teaspoon baking soda
04 - 1/2 teaspoon salt
05 - 1 cup granulated sugar
06 - 1/2 cup unsalted butter, softened
07 - 1 large egg
08 - 1 cup buttermilk
09 - 1 teaspoon vanilla extract
→ Marshmallow Filling
10 - 1/2 cup unsalted butter, softened
11 - 1 1/4 cups powdered sugar
12 - 7 oz marshmallow creme
13 - 1 teaspoon vanilla extract
14 - Pinch of salt
# How To Make It:
01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, cocoa powder, baking soda, and salt until well combined.
03 - In a large bowl, beat butter and sugar until light and fluffy, approximately 2 minutes. Add egg and beat until incorporated.
04 - Mix in buttermilk and vanilla extract. The batter may appear curdled, which is normal.
05 - Gradually add dry ingredients to wet mixture, mixing until just combined. Do not overmix.
06 - Using a cookie scoop or tablespoon, drop 2-tablespoon rounds of batter onto prepared baking sheets, spacing 2 inches apart.
07 - Bake for 10-12 minutes until tops spring back when gently pressed. Cool completely on wire rack.
08 - Beat butter until creamy. Add powdered sugar and beat until smooth. Mix in marshmallow creme, vanilla, and salt until fluffy and fully combined.
09 - Spread or pipe generous dollop of filling onto flat side of half the cookies. Top with remaining cookies, flat side down, to create sandwiches.
# Expert Hints:
01 -
- The cookie exterior stays incredibly soft for days, unlike traditional cookies that harden up
- That marshmallow filling tastes like childhood summers and campfire memories combined
02 -
- The batter looking curdled after adding buttermilk is totally normal—dont panic and keep mixing
- Room temperature ingredients are nonnegotiable or your filling will separate and weep
03 -
- Use a cookie scoop for uniform sizing so all your pies match
- Dont overfill or the filling will squish out when you take that first bite