01 - In a medium bowl, gently mash 10 oz raspberries with 2 tbsp granulated sugar and 1 tbsp lemon juice. Set aside for 10 minutes to release juices and soften.
02 - In a large bowl, beat cold heavy cream with electric mixer until soft peaks form. Add mascarpone, powdered sugar, and vanilla extract. Fold gently until completely smooth and creamy.
03 - Combine cooled coffee and raspberry liqueur in a shallow dish for dipping ladyfingers.
04 - Quickly dip each ladyfinger into coffee mixture (1-2 seconds per side). Arrange in single layer in 8x8 inch dish.
05 - Spread half of macerated raspberries evenly over ladyfingers.
06 - Spread half of mascarpone mixture over raspberry layer using offset spatula.
07 - Repeat with remaining dipped ladyfingers, followed by remaining raspberries, then final layer of mascarpone cream. Smooth top evenly.
08 - Cover tightly with plastic wrap. Refrigerate minimum 4 hours or overnight for best texture and flavor development.
09 - Before serving, top with fresh raspberries, dust with powdered sugar, and add mint leaves if desired. Cut into squares and serve cold.