01 -
Preheat the oven to 200°C. Line a jelly roll pan with parchment paper and lightly grease it. Sift together the flour and espresso powder to remove lumps and set aside.
02 -
Using an electric mixer with a whisk attachment, beat the egg whites until foamy. Gradually add 5 tablespoons of sugar while continuing to beat until medium peaks form. Set aside.
03 -
In a separate bowl, combine egg yolks, whole eggs, and 3 tablespoons sugar. Beat until the mixture reaches the ribbon stage, approximately 5 to 10 minutes.
04 -
Fold the egg white meringue gently into the egg yolk mixture in three additions to preserve airiness. Then fold in the sifted flour-espresso mixture until just combined. Pour the batter into the prepared pan, smoothing evenly, and tap gently to remove air bubbles. Bake for 8 to 10 minutes until set.
05 -
Immediately dust the baked cake with cocoa powder. Carefully invert it onto fresh parchment, remove the original parchment, then roll the cake and parchment together from the short end. Allow to cool for 20 minutes, then unroll and let cool completely.
06 -
Beat cold heavy cream, confectioners' sugar, vanilla extract, and coffee liqueur with an electric mixer to soft peaks. Gently fold in mascarpone cheese until smooth.
07 -
Spread half the filling evenly over the cooled cake, leaving a 6 mm border. Roll the cake tightly from the same end. Frost the exterior with remaining filling and dust with cocoa powder. Trim ends before serving for a neat presentation.