01 -
Melt the butter in the microwave or in a small saucepan over low-medium heat without letting it bubble. Pour into a large mixing bowl and cool to room temperature in the refrigerator for about 20 minutes.
02 -
Once butter has cooled, add granulated sugar and whisk together for 1 minute. Add the egg and vanilla extract, mixing until thoroughly combined.
03 -
In a separate bowl, combine flour, baking powder, baking soda, matcha powder, and salt. Add these dry ingredients to the wet mixture and fold together until just combined.
04 -
Using a 2 tbsp (53 g) cookie scoop, portion dough into 11 equal pieces on a parchment-lined tray. Roll each portion between your hands into a ball, then lightly flatten into a donut-like shape. Refrigerate for 30 minutes to set.
05 -
Preheat oven to 180°C. Place 6 cookies on a lined baking sheet, keeping the remaining 5 refrigerated. Bake one tray at a time for 10-11 minutes.
06 -
Allow cookies to cool on the baking tray for 3 minutes before transferring to a cooling rack with a spatula. Let cool completely before assembling.
07 -
In a medium bowl, whip together all mascarpone cream ingredients until stiff peaks form and the mixture holds its shape. If made ahead, refrigerate covered until ready to use.
08 -
Transfer mascarpone cream to a piping bag fitted with a tip (such as Wilton 2A). Pipe cream onto each cookie in a swirl pattern, working from the center outward. Dust lightly with matcha powder using a fine mesh sieve.