In a shallow dish, combine cooled coffee and 1 tablespoon of matcha powder.
Quickly dip each ladyfinger into the coffee mixture, ensuring they are lightly soaked but not soggy.
In a large bowl, beat mascarpone cheese and sugar until smooth and creamy.
In a separate bowl, whip heavy cream with vanilla extract until stiff peaks form.
Gently fold whipped cream into the mascarpone mixture.
In a serving dish or individual glasses, arrange a layer of coffee-soaked ladyfingers.
Spread half of the mascarpone cream mixture over the ladyfingers.
Dust with remaining 1 tablespoon of matcha powder.
Repeat layers with remaining ladyfingers and mascarpone cream.
Dust the top layer generously with matcha powder.
Cover and refrigerate for at least 2 hours to allow the flavors to meld.
For a richer flavor, add a tablespoon of coffee liqueur to the coffee mixture. If mascarpone cheese is unavailable, cream cheese can be used as a substitute, although it will alter the flavor and texture slightly.