01 - Gently mash 10.6 oz raspberries with 2 tbsp granulated sugar and 1 tbsp lemon juice in a medium bowl. Let stand for 10 minutes to macerate, allowing flavors to meld.
02 - Whip cold heavy cream in a large bowl until soft peaks form. Add mascarpone, powdered sugar, and vanilla extract. Fold together gently until smooth and creamy, being careful not to overmix.
03 - Combine cooled coffee and raspberry liqueur in a shallow dish. Stir to blend evenly.
04 - Quickly dip each ladyfinger in the coffee mixture, ensuring a brief dip without soaking. Arrange a single layer of dipped ladyfingers in the bottom of 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, using an offset spatula to create an even surface.
07 - Add a second layer of coffee-dipped ladyfingers over the cream, repeating the quick dipping process.
08 - Top with remaining macerated raspberries, then finish with the rest of the mascarpone cream. Smooth the surface with a spatula for a professional finish.
09 - Cover tightly with plastic wrap and refrigerate for at least 4 hours, preferably overnight, to allow flavors to develop and texture to set properly.
10 - Just before serving, top with fresh raspberries, dust with powdered sugar using a fine mesh sieve, and garnish with mint leaves if desired.