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 macerate.
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.
03 - In a shallow dish, combine cooled coffee and raspberry liqueur if using.
04 - Quickly dip each ladyfinger in the coffee mixture without soaking. Arrange a layer of dipped ladyfingers in an 8x8 inch dish.
05 - Spoon half of the macerated raspberries over the ladyfingers, spreading evenly.
06 - Spread half of the mascarpone cream mixture over the raspberry layer.
07 - Add a second layer of coffee-dipped ladyfingers.
08 - Top with remaining raspberries, then the rest of the mascarpone cream. Smooth the surface.
09 - Cover with plastic wrap and refrigerate for at least 4 hours, ideally overnight.
10 - Before serving, garnish with fresh raspberries, a dusting of powdered sugar, and mint leaves if desired.