Tiramisu cake

I made this cake as a present for a house-warming party. It was a first time I made tiramisu in a cake form, so I modified my classic recipe a little bit to make it work. I added gelatine to keep it stay and for the stronger texture.

Ingredients:

2 ready made round sponges (21cm diameter and about 3-4cm thick)
1,5 package lady-fingers biscuits
1 tbsp good quality cocoa powder (I used Dutch-processed)

Tiramisu cream:
250g mascarpone,
250ml heavy cream,
3 eggs,
100ml Kahlua (any coffee liqueur or Irish Cream would work well)
1 leaf gelatine (you can add 1 more leaf for stronger texture or for the summer time),
1/2 cup caster sugar,
1 vanilla pod or 1 tsp vanilla essence,


Soak gelatine leaf in cold water. Set aside.
Put the mascarpone in a small bowl and gently fold in the liqueur and vanilla seeds (or vanilla essence). Set aside.
Put the egg yolks and 1/4 cup of sugar on a double boiler and whisk until sugar dissolved and mixture is hot on touch. Remove from heat and beat with an electric mixer until light and fluffy then gently fold in the mascarpone mixture.
Whip the cream until soft peaks and fold in the mascarpone mixture.
Drain the water from the gelatine and dissolve it in microwave or over a double boiler.
Whip the egg whites until soft peaks, continuing whipping slowly add the dissolved gelatine and whip until glossy. Slowly fold in the mascarpone mixture.


Syrup:

100ml strong espresso,
4 tbsp sugar,
50ml Kahlua.

Mix all ingredients and stir until sugar dissolved. Allow to cool.

To assemble:
Put one circle of sponge on the bottom of 23cm spring-form cake pan. Arrange lady-finger biscuits around the sides of the pan. Moist the sponge with prepared syrup then cover with the half of mascarpone cream. Cover with second sponge, moist it with the syrup then cover with the remaining mascarpone cream. Dust over with the cocoa powder. Refrigerate for at least 6 hours.