Step 1: Prepare the Egg Mixture
In a heatproof bowl, whisk together the egg yolks, sugar, vanilla, and salt.
Place the bowl over a saucepan of simmering water (double boiler method).
Whisk constantly for 8–10 minutes, or until the mixture becomes pale, thick, and slightly foamy.
Remove from heat and let cool completely.
Note: This step gently pasteurizes the eggs for safety and creates a light, velvety texture.
Step 2: Make the Mascarpone Cream
In a large bowl, whip the heavy cream to stiff peaks using a hand mixer.
In another bowl, gently beat the mascarpone until smooth.
Fold the cooled egg mixture into the mascarpone until combined.
Gently fold in the whipped cream in two parts, being careful not to deflate the mixture.
Step 3: Soak the Ladyfingers
Pour the strong black coffee into a shallow dish.
Quickly dip each ladyfinger (1–2 seconds per side) until just soaked, not soggy.
Over-soaking can make the tiramisu mushy—just a quick dip is enough.
Step 4: Assemble the Tiramisu
In a 9x9 inch dish or similar, arrange a single layer of soaked ladyfingers.
Spread half of the mascarpone cream evenly over the ladyfingers.
Repeat with a second layer of soaked ladyfingers and the remaining cream.
Smooth the top with a spatula.
Step 5: Chill & Dust with Cocoa
Cover and refrigerate the tiramisu for at least 6 hours, preferably overnight.
Before serving, dust the top with a generous layer of unsweetened cocoa powder.
Slice and serve chilled!