01 -
Preheat the oven to 350°F (180°C). Line baking sheets with parchment paper or silicone mats. Set aside.
02 -
In a medium bowl, whisk together the all-purpose flour, cocoa powder, baking soda, and salt until evenly distributed.
03 -
Using a mixer on medium speed, cream unsalted butter, granulated sugar, and light brown sugar until light and fluffy, approximately 2-3 minutes.
04 -
Add the large egg to the creamed mixture and blend until combined. Then add vanilla extract, vinegar, and red food coloring; mix thoroughly.
05 -
Gradually add the dry ingredients to the wet mixture, mixing just until incorporated. Avoid overmixing.
06 -
Portion the dough into 1 1/2 tablespoon-sized balls. Gently roll each portion into a smooth ball and space them about 2 inches apart on the prepared baking sheets.
07 -
Bake in the preheated oven for 7-9 minutes. Cookies should spread slightly with soft centers but appear fully baked.
08 -
Remove cookies from the oven and allow them to cool on the baking sheets for 4-5 minutes before transferring to wire racks to cool completely.
09 -
In a large bowl, beat cream cheese and unsalted butter until smooth. Gradually add powdered sugar in two additions, mixing well after each. Stir in vanilla extract until homogeneous and creamy.
10 -
Using a piping bag, apply frosting onto the flat side of one cookie, then top with a second cookie to create a sandwich. Roll the edges in sprinkles if desired.
11 -
Refrigerate assembled sandwiches until firm. Serve at room temperature and consume within 3-4 days for optimal freshness.