Sugar and egg whites are broken down into the snow. Gradually add the beaten egg yolks and vanilla. One base is placed in a suitable container (dish baking dish) and sprinkle with cognac. On it in the middle of the cross is poured ice-cream and covered with a second base. The base also sprayed with cognac. Top with the help of a syringe is decorated with the egg mixture. In the middle is placed a small cup or peel of half a lemon (which is carved) - this is the top of the volcano. Sprinkle with powdered sugar and put in a very hot oven for about ten minutes. When pulled again sprinkle with powdered sugar. Brandy is poured into the cup. The cake is served whole and ignited brandy. The surprise is the fact that the surface of the cake is hot (just removed from the oven), the interior ice - ice cream did not have time to melt.