Fold in Mascarpone Cheese. Then add in Vanilla Extract.
Dip the Sponge Fingers / Lady Fingers into the cooled-down Coffee (not soaked) and layer them onto the bottom of the cake tin.
Once the cake tin is fully layered with the dipped Lady Fingers, top it with the cream mixture. Repeat until the layers fill up your tin.
Put into the refrigerator to chill for at least an hour. Dust with cocoa powder before serving.
Savoiardi Lady Fingers are the most common biscuit used for making Tiramisu. If you can't find them, especially in the UK, you can use Sponge Fingers instead.
Dip the lady/sponge fingers into the coffee but do not allow it to soak in it. A quick dip is enough for the biscuit to absorb the liquid and transform into a sponge cake-like texture. Fully soaking it will result in a soggy texture and it won't hold its shape.