01 -
Sift together the all-purpose flour, cornstarch, cocoa powder, granulated sugar, and salt in a large bowl. Set aside.
02 -
In a separate bowl, whisk eggs, cold milk, and vanilla extract until smooth and fully combined.
03 -
Gradually pour the wet mixture into the dry ingredients while whisking continuously to prevent lumps. Stir in the melted butter until the batter is smooth. Allow to rest for 20–30 minutes at room temperature or refrigerate overnight.
04 -
Heat a nonstick skillet over medium heat and grease lightly if needed. Pour about 1/4 cup of batter, swirling to cover the pan thinly. Cook 1–2 minutes until edges lift and underside is set, flip and cook an additional 30 seconds to 1 minute. Transfer to a rack to cool and repeat with remaining batter.
05 -
Place egg yolks and sugar in a heatproof bowl over simmering water (Bain-Marie). Whisk constantly for 4–5 minutes until thickened, pale, and sugar is dissolved. Remove from heat.
06 -
Whisk heavy cream and mascarpone until stiff peaks form and mixture is smooth.
07 -
Gently fold the egg yolk mixture into the whipped cream and mascarpone. Incorporate coffee liqueur if using. Set aside.
08 -
Arrange cooked crêpes overlapping on a lined sheet pan to prevent gaps. Spread a layer of tiramisu cream over the crêpes, then add biscuits soaked in coffee liqueur or coffee on top. Repeat layering with cream and biscuits until filling is used.
09 -
Carefully roll the layered crêpes into a tight log, ensuring the filling stays inside. Chill for at least 4 hours to set.
10 -
Dust the chilled roll generously with cocoa powder before slicing and serving.