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. Add mascarpone, powdered sugar, and vanilla extract. Fold together gently until smooth and creamy.
03 - Combine cooled coffee and raspberry liqueur in a shallow dish for dipping ladyfingers.
04 - Quickly dip each ladyfinger in coffee mixture—do not soak. Arrange dipped ladyfingers in a single layer in an 8x8 inch dish.
05 - Spread half of macerated raspberries evenly over ladyfingers.
06 - Spread half of mascarpone cream mixture over raspberry layer, smoothing evenly.
07 - Add another layer of coffee-dipped ladyfingers. Top with remaining raspberries, then remaining mascarpone cream. Smooth surface completely.
08 - Cover with plastic wrap. Refrigerate at least 4 hours, preferably overnight, to set completely.
09 - Top with fresh raspberries, dust with powdered sugar, and add mint leaves if desired before serving.