01 - In a medium bowl, gently mash 10.6 oz raspberries with 2 tbsp granulated sugar and 1 tbsp lemon juice. Set aside for 10 minutes to release natural juices.
02 - In a separate large bowl, beat the cold heavy cream until soft peaks form. Add mascarpone, powdered sugar, and vanilla extract. Gently fold together until smooth and creamy consistency is achieved.
03 - In a shallow dish, combine cooled coffee and raspberry liqueur if using. This will be used to briefly dip the ladyfingers.
04 - Quickly dip each ladyfinger in the coffee mixture without soaking. Arrange a single layer of dipped ladyfingers in an 8x8 inch serving dish.
05 - Spoon half of the macerated raspberries over the ladyfingers, spreading evenly to cover the surface.
06 - Spread half of the mascarpone cream mixture over the raspberry layer, creating an even coating.
07 - Add a second layer of coffee-dipped ladyfingers, ensuring they are lightly soaked but not saturated.
08 - Top with remaining macerated raspberries, then finish with the rest of the mascarpone cream. Smooth the surface with a spatula for even presentation.
09 - Cover tightly with plastic wrap and refrigerate for at least 4 hours, preferably overnight, to allow flavors to meld and texture to firm.
10 - Before serving, arrange fresh raspberries on top, dust with powdered sugar, and garnish with mint leaves if desired.