01 - Beat heavy cream with half the sugar until soft peaks form, ensuring a stable but not stiff consistency for folding.
02 - Whisk mascarpone with remaining sugar and vanilla until smooth and lump-free.
03 - Gently fold whipped cream into mascarpone base using a spatula until fully incorporated and uniform in texture.
04 - Toss fresh raspberries with raspberry liqueur if using, coating evenly to infuse flavor.
05 - Quickly dip each ladyfinger into cooled coffee, submerging briefly to absorb moisture without becoming soggy.
06 - Arrange half the dipped ladyfingers in an even layer in the bottom of an 8x8 inch dish.
07 - Spread half the mascarpone cream evenly over ladyfingers, then distribute half the raspberries across the surface.
08 - Repeat layering with remaining ladyfingers, mascarpone cream, and raspberries, finishing with berries on top.
09 - Cover and refrigerate for at least 4 hours or overnight to allow flavors to meld and texture to set.
10 - Dust generously with powdered sugar and garnish with additional fresh raspberries and mint leaves just before serving.