01 -
Brew strong espresso or coffee and allow it to cool completely. Stir in dark rum if using.
02 -
In a large bowl, beat egg yolks and granulated sugar until the mixture is pale, thick, and creamy.
03 -
Gently fold cold mascarpone into the yolk mixture until smooth and well combined.
04 -
In a separate chilled bowl, whip the heavy cream until stiff peaks form.
05 -
Carefully fold whipped cream into the mascarpone mixture in batches until smooth and airy.
06 -
Quickly dip each ladyfinger into the coffee mixture for 1-2 seconds per side, then arrange in a single layer in a 9x9 or 7x11 inch dish.
07 -
Spread half of the mascarpone cream mixture evenly over the ladyfingers.
08 -
Add a second layer of dipped ladyfingers followed by the remaining mascarpone cream.
09 -
Just before serving, use a fine-mesh sieve to dust the top with cocoa powder.
10 -
Refrigerate tiramisu for at least 4 hours, preferably overnight, to set and develop flavor.