Creating Classic Tiramisu can be straightforward if you follow these simple steps:

1. Prepare the Coffee Mixture: In a shallow dish, mix the cooled espresso and coffee liqueur (if using). Set aside.
2. Whip Egg Yolks: In a mixing bowl, whisk the egg yolks and granulated sugar until pale and creamy.
3. Add Mascarpone: Gently fold in the mascarpone cheese until smooth and well combined.
4. Whip Egg Whites: In a separate bowl, whip the egg whites until stiff peaks form. Gently fold the whipped egg whites into the mascarpone mixture.
5. Whip the Cream: In another bowl, whip the heavy cream until it holds soft peaks. Carefully fold the whipped cream into the mascarpone mixture, being cautious not to deflate it.
6. Dip Ladyfingers: Quickly dip each ladyfinger into the coffee mixture, ensuring they are soaked but not soggy.
7. Layer the Ingredients: In a 9×9 inch dish, arrange a layer of soaked ladyfingers at the bottom. Spread half of the mascarpone mixture over the ladyfingers.
8. Repeat Layers: Add another layer of soaked ladyfingers, followed by the remaining mascarpone mixture.
9. Chill: Cover the dish with plastic wrap and refrigerate for at least 4 hours, preferably overnight.
10. Serve: Before serving, dust the top with unsweetened cocoa powder and garnish with dark chocolate shavings if desired.

These steps will guide you in creating this incredible dessert effortlessly, ensuring that your Classic Tiramisu turns out perfectly every time.