01 - Beat heavy cream with half the sugar until soft peaks form, then set aside.
02 - Whisk mascarpone with remaining sugar and vanilla until smooth. Gently fold whipped cream into mixture until fully incorporated.
03 - Toss fresh raspberries with raspberry liqueur in a small bowl, if using.
04 - Quickly dip each ladyfinger into cooled coffee, ensuring absorption without becoming soggy.
05 - Arrange half the coffee-soaked ladyfingers in an 8x8 inch dish. Spread half the mascarpone cream evenly over top, then scatter with half the raspberries.
06 - Repeat layering with remaining ladyfingers, mascarpone mixture, and raspberries.
07 - Cover dish and refrigerate for at least 4 hours or overnight to allow flavors to meld and texture to firm.
08 - Dust surface with powdered sugar. Garnish with additional fresh raspberries and mint leaves before serving.