Creating Classic Tiramisu is straightforward when you follow these easy steps:

1. Prepare the Coffee: Brew a strong cup of coffee and let it cool. If using coffee liqueur, mix it in once the coffee is cool.
2. Whisk Egg Yolks and Sugar: In a large mixing bowl, whisk together the egg yolks and granulated sugar until the mixture is thick and pale.
3. Heat Milk: In a saucepan, heat the milk over medium heat until it begins to simmer. Do not boil.
4. Combine Mixtures: Slowly whisk the hot milk into the egg mixture, continuing to whisk until fully combined.
5. Cook the Mixture: Return the combined mixture to the saucepan and cook over low heat, stirring constantly until it thickens slightly (about 5-7 minutes).
6. Cool the Mixture: Remove from heat and let it cool completely.
7. Whip the Cream: In a separate bowl, whip the heavy cream until soft peaks form.
8. Fold in Mascarpone: Gently fold the cooled custard into the whipped cream, followed by the mascarpone cheese. Mix until smooth.
9. Soak the Ladyfingers: Quickly dip each ladyfinger into the cooled coffee mixture, ensuring they are soaked but not soggy.
10. Layer the Tiramisu: In a serving dish, layer half of the soaked ladyfingers, followed by half of the mascarpone mixture. Repeat with the remaining ladyfingers and mascarpone.
11. Chill: Cover and refrigerate for at least 4 hours, preferably overnight, to allow the flavors to meld.
12. Dust with Cocoa: Before serving, dust the top with cocoa powder and add chocolate shavings if desired.

With these steps, you’ll create a Classic Tiramisu that will leave everyone wanting more.