Tirmisu

For the Cream

• 3 large egg yolks
• ½ cup (100g) granulated sugar
• 8 oz (225g) mascarpone cheese
• ¾ cup (180ml) heavy cream

For the Layers

• 1 cup (240ml) brewed espresso or strong coffee, cooled
• 2 tbsp coffee liqueur (optional, like Kahlúa or Marsala wine)
• 20-24 ladyfinger biscuits (savoiardi)

For Garnish

• Unsweetened cocoa powder (for dusting)
• Dark chocolate shavings (optional)