Of the products above pretend board, the products are a board and if you want more than one will have to increase the dose. Separate the egg whites and yolks. Yolks are broken down by 1/3 of sugar, while increasing its volume. Egg whites kill with remaining sugar snow. Add to the egg yolks, flour, baking powder and stir gently with a spoon. Pour into a rectangular tray 20x30 cm and bake the first 15 minutes of 180C degrees, then the degrees be reduced to 160C. When ready the base is removed and allowed to cool. The soft butter stir well with a mixer, add powdered sugar, again stir well with a mixer and finally put instant coffee dissolved in advance 1/2 tbsp water. Leave a little of cream on top and the rest is spread up the cold base. Wound is smeared with the rest of the cream and leave in refrigerator for 2 hours. For ganasha: Sour cream is poured into a container and put it on the stove. Shortly before it begins to boil add the chocolate, remove from heat and stir well to melt the chocolate. Allow to cool slightly, then put in the fridge to harden, so that it can be smeared. roll smeared with ganasha and fork are made vertical lines (such as sheet). Cut a small part of the roll angle and put up a big cut out - to get as a branch of the tree. The two parts are glued together with a little Ghana and fork again make cuts.