01 - Beat heavy cream with half the granulated sugar in a mixing bowl until soft peaks form. Set aside.
02 - Whisk mascarpone with remaining sugar and vanilla extract in a separate bowl until smooth. Gently fold whipped cream into mascarpone mixture until fully incorporated.
03 - If using liqueur, toss fresh raspberries with raspberry liqueur in a small bowl. For non-alcoholic version, leave raspberries plain.
04 - Quickly dip each ladyfinger into cooled coffee, ensuring absorption without becoming soggy. Arrange half the ladyfingers in a single layer at bottom of 8x8 inch dish.
05 - Spread half the mascarpone cream evenly over soaked ladyfingers. Scatter half the prepared raspberries across cream layer.
06 - Repeat layering process with remaining ladyfingers, mascarpone cream, and raspberries. Ensure even distribution for consistent texture.
07 - Cover dish with plastic wrap or lid. Refrigerate for minimum 4 hours, or preferably overnight, to allow flavors to meld and dessert to set properly.
08 - Just before serving, dust surface generously with powdered sugar using a sifter. Garnish with additional fresh raspberries and mint leaves if desired. Serve cold.