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 release juices.
02 - Whip cold heavy cream in a large bowl until soft peaks form. Fold in mascarpone cheese, powdered sugar, and vanilla extract until smooth and fully incorporated.
03 - Combine cooled coffee and raspberry liqueur in a shallow dish for dipping ladyfingers.
04 - Briefly dip each ladyfinger in coffee mixture, working quickly to prevent oversaturation. Arrange in a single layer in an 8x8 inch dish.
05 - Spread half the macerated raspberries evenly over the ladyfingers.
06 - Distribute half the mascarpone cream mixture over the raspberries, smoothing with a spatula.
07 - Repeat with another layer of coffee-dipped ladyfingers.
08 - Top with remaining macerated raspberries, then finish with the remaining mascarpone cream. Smooth the top surface evenly.
09 - Cover tightly with plastic wrap and refrigerate for at least 4 hours, preferably overnight, to allow flavors to meld.
10 - Just before serving, decorate top with fresh raspberries, dust with powdered sugar, and add mint leaves if desired.