Soft, chocolatey homemade Oreos sandwiched with a silky green mint cream cheese filling. A fun, easy cookie for Christmas trays and St. Patrick's Day parties.
In a medium bowl, whisk together the flour, cocoa powder, baking soda, baking powder and salt. Set aside.
In a large bowl with a hand mixer, or in a stand mixer fitted with the paddle attachment, beat the softened butter and sugar on medium speed for 2 to 3 minutes until light and fluffy. Add the egg and vanilla extract and beat for 1 to 2 minutes more.
With the mixer on low, add the dry ingredients in three additions, mixing just until a crumbly dough forms.
Cover the bowl and chill the dough in the refrigerator for 30 minutes.
Preheat the oven to 350°F (175°C). Line two large baking sheets with parchment paper or silicone baking mats.
Squeeze the chilled dough together, then roll it into balls of about 2 teaspoons each. Place them 2 inches apart on the prepared baking sheets and press each ball down slightly to flatten.
Bake for 6 to 8 minutes, until the edges are set. Let the cookies cool on the pan for 5 minutes, then move them to a wire rack to cool completely. Bake the remaining dough the same way.
For the filling and assembly
In a large bowl with a hand mixer, or in a stand mixer fitted with the paddle attachment, beat the cream cheese and butter for about 2 minutes until smooth.
Add the mint extract and powdered sugar and beat for 2 to 3 minutes more, until smooth and fluffy. Stir in green food coloring a drop at a time until you like the color.
Spoon the filling into a piping bag fitted with a star tip. Pair up cookies of the same size, pipe filling onto the flat side of one cookie, and gently press a second cookie on top.
Serve right away or refrigerate in an airtight container until serving.
Notes
Storage: Because the filling contains cream cheese, keep filled cookies in an airtight container in the refrigerator for up to 4 days. Let them sit out 10 to 15 minutes before serving if you like them a little crisper.Freezing: Freeze filled cookies in a single layer until firm, then transfer to a freezer bag for up to 2 months. Thaw overnight in the refrigerator.Peppermint extract: It's stronger than mint extract, so start with ½ teaspoon and add more to taste.Yield: Makes about 24 sandwich cookies, depending on size.