Soft Chocolate Marshmallow Sandwich Cookies (Print Version)
Cakey chocolate cookies with fluffy marshmallow cream filling—a beloved American classic.
# What You 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 - 1 jar marshmallow creme (7 oz)
13 - 1 teaspoon vanilla extract
14 - Pinch of salt
# How To Make:
01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, cocoa powder, baking soda, and salt in a medium bowl.
03 - Beat butter and sugar in a large bowl until light and fluffy, approximately 2 minutes. Add egg and beat until combined.
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.
06 - Drop rounded tablespoons 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, beating until smooth. Mix in marshmallow creme, vanilla, and salt until fluffy and fully combined.
09 - Spread or pipe filling onto flat side of half the cookies. Top with remaining cookies, flat side down, to form sandwiches.
10 - Serve immediately or store in airtight container for up to 3 days. Unfilled cookies freeze well for later use.
# Expert Tips:
01 -
- The cookie shells stay incredibly soft for days, unlike typical cookies that harden up
- That marshmallow filling creates the most satisfying squish when you take a bite
- They transport better than cakes but feel more special than ordinary cookies
02 -
- That curdled batter appearance after adding buttermilk is totally normal—do not panic and keep mixing
- Let the cookies cool completely before filling or the marshmallow fluff will slide right off
- These actually taste better on day two when the flavors have had time to meld together
03 -
- Use a cookie scoop for uniform rounds so all your pies look professional
- Chill the assembled whoopie pies for 30 minutes before serving to make them easier to transport