01 - In a medium bowl, gently mash 10.6 ounces raspberries with 2 tablespoons granulated sugar and 1 tablespoon lemon juice. Set aside for 10 minutes to macerate and release their 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, being careful not to overmix.
03 - In a shallow dish, combine cooled coffee and raspberry liqueur if using. Stir well to combine.
04 - Quickly dip each ladyfinger in the coffee mixture, working rapidly to prevent oversaturation. Arrange a single layer of dipped ladyfingers in the bottom of an 8x8 inch dish.
05 - Spoon half of the macerated raspberries over the ladyfingers, spreading evenly to cover the entire surface.
06 - Spread half of the mascarpone cream mixture over the raspberry layer, using a spatula to create an even surface.
07 - Add a second layer of coffee-dipped ladyfingers, following the same quick dipping technique.
08 - Top with remaining macerated raspberries, then spread the rest of the mascarpone cream over top. Smooth the surface with your spatula for an even finish.
09 - Cover tightly with plastic wrap and refrigerate for at least 4 hours, though overnight chilling produces the best texture and flavor integration.
10 - Before serving, arrange fresh raspberries on top, dust generously with powdered sugar, and add mint leaves if desired. Cut into squares and serve chilled.