First beat the sugar with the egg yolks. Add the mascarpone little by little and keep on beating. Beat the egg whites until they're firm and add them slowly to the yolks-sugar and mascarpone you prepared previously. Now that you're done with the more complicated part of the recipe all you have to do is dip your biscuits briefly into the espresso coffee and began creating a single layer at the bottom of you cake plate. Then add the cream and a second layer of soaked biscuits, after the second layer of cream sprinkle with the powder cocoa and refrigerate for at least 3 hours. Enjoy it!