Chef John's Tiramisu

Instructions

• Stir together espresso and 2 tablespoons wine in a shallow bowl. Set aside.
• Whisk together egg yolks, 2 tablespoons plus 1 teaspoon sugar, and remaining 1 tablespoon wine in a large bowl over a pot of simmering water until thick, pale yellow, and creamy, 5 to 6 minutes.
• Remove the bowl from heat and whisk in mascarpone, vanilla, and salt until completely smooth.
• Beat egg whites in a glass or metal bowl until stiff peaks form. Lift your beater or whisk straight up to ensure egg whites form sharp peaks. Gently stir and fold 1/2 of the egg whites into mascarpone mixture; fold in remaining egg whites.
• Place 1 heaping spoonful mascarpone mixture into a single-serving glass or cup. Dip 2 cookie halves briefly in espresso mixture; turn 3 to 4 times to coat. Place cookie halves in the bottom of the glass on top of mascarpone.
• Fill the glass halfway with mascarpone mixture. Dip 5 ladyfinger halves in espresso mixture and place vertically along the inside of the glass, dipping and placing more ladyfinger halves as needed to fit the glass. Place 2 dipped ladyfinger halves horizontally on top of mascarpone. Fill the glass to the top with mascarpone mixture. Repeat with second glass.
• Wrap both glasses in plastic wrap and refrigerate for at least 8 hours to overnight. Remove plastic wrap and dust tops with cocoa and grated chocolate before serving.