These adorable sandwich cookies consist of a sweet, rich vanilla buttercream filling that is sandwiched between two crunchy and slightly salty chocolate wafers. Fair warning: these cookies are dangerously addictive. It's seriously hard just to eat one.
The recipe is adapted from the chocolate espresso sandwich cookie recipe over at Joy the Baker:
Chocolate Sandwich Cookies
6 tbsp butter (room temperature)
3 1/2 c (390 g) powdered sugar
4 tbsp milk
1 tsp vanilla extract
3/4 c sugar
1 1/2 c + 3 tbsp (236 g) all-purpose flour
3/4 c + 1 tbsp (67 g) cocoa powder
1/2 tsp baking soda
1 tsp salt
15 tbsp butter (room temperature and cut up into 3/4 inch chunks)
1. To make the filling, place the butter, powdered sugar, milk, and vanilla in a medium sized bowl. Beat all of the ingredients together until they are smooth and creamy.
2. To make the cookies, whisk the sugar, flour, cocoa powder, baking soda, and salt together in a medium sized bowl. Using an electric mixer on low speed, incorporate the butter into the flour mixture a few chunks at a time. While you are mixing, the dough will slowly turn sandy and then will start clumping together. Stop mixing when clumping phase starts.
3. Move one rack to the top third of your oven and another rack to the bottom third of your oven. Preheat the oven to 350°.
4. Divide the finished cookie dough in half. On a lightly floured surface, roll out one half of the dough to 1/8 inch thickness. Cut out rounds using a 2 inch cookie cutter and place them on an ungreased cookie sheet. Repeat for the second half of the dough. You can re-roll your dough scraps once to get a few more cookies.
5. Bake the cookies two baking sheets at a time, placing one baking sheet on the upper oven rack and the other baking sheet on the lower oven rack. Bake the cookies for 6 minutes and then rotate the positions of the two baking sheets. Continue baking the cookies for another 6 minutes.
6. Allow the cookies to cool for two minutes on the baking sheets before transferring them to a wire rack to cook completely.
7. To assemble the sandwiches, place a dollop of the filling onto one cookie and then gently press it together with a second cookie.