Creating Tiramisu Cheesecake is simple if you follow these steps:

1. Prepare the Crust: In a medium bowl, combine graham cracker crumbs, melted butter, and granulated sugar. Mix until well combined. Press the mixture firmly into the bottom of a 9-inch springform pan to form an even crust.

2. Make the Filling: In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth. Gradually add the powdered sugar, mixing until fully incorporated.

3. Add Mascarpone: Add the mascarpone cheese and vanilla extract to the cream cheese mixture. Beat until smooth and creamy.

4. Whip the Cream: In a separate bowl, whip the heavy cream until stiff peaks form. Gently fold the whipped cream into the cream cheese mixture until well blended.

5. Combine Coffee and Liqueur: In a shallow dish, mix the cooled coffee with coffee liqueur (if using).

6. Layer the Ingredients: Dip each ladyfinger into the coffee mixture for a few seconds, then layer them in the bottom of the springform pan over the crust.

7. Add Cheesecake Filling: Pour half of the cheesecake filling over the layer of dipped ladyfingers. Smooth it out evenly.

8. Repeat Layers: Dip more ladyfingers in the coffee mixture and layer them over the cheesecake filling. Pour the remaining cheesecake filling on top and smooth it out.

9. Chill: Cover the springform pan with plastic wrap and refrigerate for at least 4-6 hours or overnight for best results.

10. Serve: Once set, carefully remove the cheesecake from the springform pan. Dust the top with unsweetened cocoa powder and garnish with chocolate shavings or coffee beans if desired.