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

1. Melt the White Chocolate: In a microwave-safe bowl, melt the white chocolate chips in 15-second intervals, stirring in between until smooth. Allow it to cool slightly.
2. Prepare the Mascarpone Mixture: In a large mixing bowl, beat the mascarpone cheese, granulated sugar, and vanilla extract until smooth and creamy.
3. Whip the Cream: In a separate bowl, whip the heavy cream until soft peaks form. Gently fold half of the whipped cream into the mascarpone mixture until combined.
4. Incorporate White Chocolate: Fold the melted white chocolate into the mascarpone mixture, followed by the remaining whipped cream. Be gentle to keep it airy.
5. Prepare the Raspberries: In a small bowl, mash half of the raspberries with a fork. Combine this with your raspberry puree to create a vibrant sauce.
6. Soak the Ladyfingers: Briefly dip each ladyfinger into the brewed coffee, ensuring they’re moist but not soggy. Lay them flat in your serving dish.
7. Layer the Mixtures: Spread half of the mascarpone mixture over the first layer of ladyfingers. Drizzle some raspberry sauce over this layer.
8. Add Another Layer of Ladyfingers: Place another layer of coffee-soaked ladyfingers on top of the mascarpone mixture.
9. Finish with the Remaining Mixture: Spread the remaining mascarpone mixture on top, smoothing it out evenly.
10. Garnish with Raspberries: Decorate the top layer with the remaining fresh raspberries.
11. Chill: Cover the dish with plastic wrap and refrigerate for at least 4-6 hours, or overnight for optimal flavor development.
12. Dust with Cocoa Powder: Before serving, lightly dust the top with cocoa powder for a finishing touch.

Following these steps will guide you toward creating an incredible White Chocolate Raspberry Tiramisu that your friends and family will rave about!