Creating your Pistazien-Tiramisu is easy if you follow these simple steps:

1. Prepare the Coffee: Brew strong coffee and let it cool completely. If using coffee liqueur, mix it in with the coffee.
2. Whip the Cream: In a mixing bowl, whip the heavy cream until soft peaks form. Gradually add the powdered sugar and continue whipping until stiff peaks form.
3. Mix Mascarpone: In another bowl, combine the mascarpone cheese, vanilla extract, and half of the ground pistachios. Mix until smooth.
4. Combine Mixtures: Gently fold the whipped cream into the mascarpone mixture until well combined. Be careful not to deflate the whipped cream.
5. Dip Ladyfingers: Quickly dip each ladyfinger into the cooled coffee mixture, ensuring they’re soaked but not soggy.
6. Layer the Dessert: In a rectangular dish, start by placing a layer of dipped ladyfingers at the bottom. Spread half of the mascarpone mixture over the ladyfingers.
7. Add More Pistachios: Sprinkle half of the remaining ground pistachios over the mascarpone layer.
8. Repeat Layers: Add another layer of dipped ladyfingers followed by the remaining mascarpone mixture, smoothing it out evenly.
9. Finish with Pistachios: Top with the remaining ground pistachios, ensuring an even distribution.
10. Chill: Cover the dish with plastic wrap and refrigerate for at least 4 hours or overnight for the best flavor.
11. Dust with Cocoa: Just before serving, dust the top with unsweetened cocoa powder for an elegant finish.

By following these steps, you’ll create a delightful Pistazien-Tiramisu that is sure to impress!