01 -
Set oven to 175°C and line a baking sheet with parchment paper.
02 -
In a mixing bowl, blend flour, cocoa powder, baking powder, and salt.
03 -
In a separate bowl, cream together softened butter, granulated sugar, and brown sugar until light and fluffy.
04 -
Incorporate the egg and vanilla extract into the creamed mixture, mixing thoroughly.
05 -
Gradually fold the dry ingredients into the wet mixture until just combined.
06 -
Drop tablespoon-sized rounds of dough onto the prepared baking sheet, spacing evenly.
07 -
Bake for 10–12 minutes until set. Remove from oven and allow to cool completely on a wire rack.
08 -
Once cooled, spread vanilla frosting over the flat side of half the cookies.
09 -
Top each frosted cookie with another cookie to form a sandwich.
10 -
Drizzle chocolate ganache across the tops of the sandwich cookies. Allow ganache to set before serving.