Over double boiler cook egg yolks and sugar for about 5 minutes until heated stirring constantly. This makes sure its safe to eat. Pour egg yolks into mixing bowl and add the mascarpone cheese. Beat until smooth . add one tablespoon espresso and mix again.

In another bowl add remaining espresso and Kahlua. Dip ladyfingers into the liquid quickly and line pan with them. Spread half of the cheese mixture on top and repeat layering until used up. If you can only find the soft lady fingers I would recommend baking them until they harden up or they tend to get mushy.