Chocolate and peppermint make the perfect pair in these Chocolate Peppermint Sandwich Cookies. They’re soft, rich, and filled with a sweet, minty cream.
Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius). Line a baking sheet with parchment paper or silicone baking mats, and set aside.
In a large saucepan over low heat, melt butter. Add brown sugar and stir with a heatproof spatula. Remove the mixture from heat. Add water, then chocolate chips, stirring until the chips are melted.
Beat in eggs one at a time, then add the vanilla. Fold in the flour, baking soda, and salt. Mix until a buttery dough forms (it will look greasy).
Roll dough into 1½” balls and place on a baking sheet. Bake for 8-10 minutes. Remove from oven and allow to cool on the baking sheet for 3-4 minutes before transferring to a wire rack to cool completely.
While the cookies are cooling, in the bowl of a stand mixer or a large mixing bowl with a hand mixer, cream butter and salt for 1 minute. Turn the mixing speed to low, gradually add powdered sugar, one cup at a time. Add milk and peppermint extract (and food coloring or candy canes if desired). Gradually increase speed and beat for 2 minutes until light and fluffy.
Place the frosting into a large piping bag fitted with a large round tip and pipe onto one side of a cooled cookie. Match up similar size/shape cookies. Allow the cookies to sit for 30 minutes before serving.
Notes
STORE Peppermint Chocolate Sandwich Cookies in an airtight container at room temperature for up to 4 days. They can also be frozen for up to 3 months in a sealed container. To FREEZE, individually wrap each cookie in plastic wrap, then place them in a freezer-safe bag.To REHEAT, let them thaw at room temperature or warm them gently in a microwave for a few seconds.