Prepare the Cream Mixture:

• In a large mixing bowl, combine mascarpone cheese, heavy cream, sugar, and vanilla extract.
• Use an electric mixer to beat until the mixture is smooth and forms soft peaks.

Prepare the Raspberry Layer:

• In a shallow dish, combine raspberry juice or syrup with raspberry liqueur (if using).

Assemble the Tiramisu:

• Quickly dip each ladyfinger biscuit into the raspberry mixture, ensuring they are soaked but not soggy.
• Arrange a layer of soaked ladyfingers at the bottom of a serving dish.
• Spread half of the mascarpone cream mixture over the ladyfingers.
• Scatter a layer of fresh raspberries over the cream.
• Repeat with another layer of soaked ladyfingers, followed by the remaining cream mixture and raspberries.

Chill:

• Cover the dish with plastic wrap.
• Refrigerate for at least 4 hours, ideally overnight, to allow flavors to meld.

Serve:

• Before serving, dust the top with powdered sugar.
• Slice and serve chilled.