01 -
Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper or silicone baking mats.
02 -
In a medium bowl, whisk together the all-purpose flour, baking powder, and salt until well combined.
03 -
In a separate large mixing bowl, use an electric mixer to beat the softened unsalted butter and granulated sugar together until light and fluffy.
04 -
Add the eggs, one at a time, to the butter mixture, beating well after each addition.
05 -
Stir in the vanilla extract until incorporated. Dissolve the instant coffee granules in the hot water, and then add it to the butter and egg mixture, mixing until smooth.
06 -
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
07 -
Using a tablespoon or small cookie scoop, drop rounded portions of dough onto the prepared baking sheets, spacing them about 2 inches apart. Bake for 10-12 minutes, or until the edges of the cookies are lightly golden but the centers remain soft.
08 -
Remove the cookies from the oven and let them cool on the baking sheets for about 5 minutes before transferring them to wire racks to cool completely.
09 -
While the cookies cool, prepare the mascarpone filling by beating the mascarpone cheese and heavy cream together in a mixing bowl until smooth and creamy. Add the coffee liqueur to the mascarpone mixture and continue to beat until well combined.
10 -
Once the cookies have cooled completely, spread a generous amount of the mascarpone filling on the bottom side of one cookie and sandwich it with another cookie.
11 -
Sift cocoa powder over the top of the assembled cookies for a dusting of flavor and decoration. Serve immediately or refrigerate the cookies for about 30 minutes to set the filling before serving.