These mint chocolate sandwich cookies feature rich chocolate cookies with a creamy mint buttercream sandwiched between and rolled in lots of chopped Andes candies.
Preheat oven to 350F. Line 2 baking sheets with parchment paper and set aside.
Place melted butter and sugar in the bowl of a large stand mixer, fitted with a paddle attachment OR in a large mixing bowl with a wooden spoon. Mix well until smooth. Add egg and vanilla, beating well until smooth.
In a medium separate bowl, combine flour, cocoa, baking soda, and salt. Add to butter mixture, mixing until dough is just combined.
Scoop dough by the tablespoon and roll into balls. Place balls 2 inches apart on prepared baking sheets and flatten slightly.
Bake cookies at 350F 7-9 minutes until cookies are crackly. Allow cookies to cool on baking sheet 20 minutes before transferring to a wire cooling rack to cool completely.
Mint Buttercream
Place butter in a large bowl (or a stand mixer fitted with paddle attachment) and use an electric mixer to beat on medium speed 2-3 minutes until creamy.
Add powdered sugar to butter mixture and beat an additional 2-3 minutes until frosting is smooth. With mixer running, add mint extract and just enough heavy cream until frosting is spreadable and creamy. Tint frosting with green food coloring if desired.
Spread mint buttercream on the bottom of half of the cooled chocolate cookies. Take remaining cookies and place on top to form a sandwich. Roll sides in chopped Andes candies if desired. Enjoy!
Notes
Storing InstructionsStore sandwich cookies in an airtight container at room temperature up to 4 days.