01 - Beat the heavy cream with half the sugar in a mixing bowl until soft peaks form, approximately 2-3 minutes. Set aside.
02 - Whisk mascarpone with remaining sugar and vanilla extract in a separate bowl until smooth and creamy. Gently fold in whipped cream until fully incorporated.
03 - Toss fresh raspberries with raspberry liqueur in a small bowl if using. Set aside to macerate slightly.
04 - Quickly dip each ladyfinger into cooled coffee, ensuring absorption without oversaturation. Arrange half the ladyfingers in a single layer in an 8x8 inch dish.
05 - Spread half the mascarpone cream evenly over dipped ladyfingers. Distribute half the prepared raspberries across the cream layer.
06 - Repeat layering with remaining ladyfingers, mascarpone cream, and raspberries. Smooth top layer with spatula.
07 - Cover dish tightly with plastic wrap. Refrigerate for minimum 4 hours or overnight to allow flavors to meld and texture to firm.
08 - Dust surface generously with powdered sugar before serving. Garnish with additional fresh raspberries and mint leaves if desired. Serve cold.