Creating White Chocolate Raspberry Tiramisu is simple if you follow these steps:

1. Melt the White Chocolate: In a microwave-safe bowl, melt the white chocolate chips in 30-second intervals, stirring until smooth. Set aside to cool slightly.
2. Whip the Cream: In a mixing bowl, whip the heavy cream until soft peaks form. Add the powdered sugar and vanilla extract, continuing to whip until stiff peaks form.
3. Combine Mascarpone: In another bowl, gently mix the mascarpone cheese with the melted white chocolate until well combined.
4. Fold in Whipped Cream: Carefully fold the whipped cream into the mascarpone mixture until fully incorporated, creating a light and fluffy filling.
5. Prepare Coffee Mixture: In a shallow dish, combine the cooled brewed coffee with coffee liqueur (if using).
6. Dip Ladyfingers: Quickly dip each ladyfinger into the coffee mixture, ensuring they are soaked but not soggy.
7. Layering: In a rectangular dish, arrange a layer of dipped ladyfingers at the bottom. Spread half of the white chocolate mixture over the ladyfingers, then sprinkle half of the fresh raspberries on top.
8. Repeat Layers: Add another layer of dipped ladyfingers, followed by the remaining white chocolate filling and raspberries.
9. Chill: Cover the dish with plastic wrap and refrigerate for at least 4 hours or overnight for best results.
10. Serve: Before serving, garnish with fresh mint leaves if desired.

These steps will guide you through the creation of this incredible dessert effortlessly.