Base: Beat eggs and sugar fluffy snow. Add sifted flour and baking powder and stir gently with a wooden spoon. Finished base to cool. It imposes on a plate so as to obtain a hat with a brim. Side edges of the base about two centimeters not be harmed. Carving is inside under the plate, leaving the bottom 1 cm. The upper crust is maintained. Cream: In a suitable container to boil the milk, the butter, sugar and cocoa for 3 minutes. Remove from heat and add the crumbs from inside the cake and cognac. Stir until smooth mixture. This fills a hole in the base. Top is capped with a cap reserved. frosting: Separate crash 3 egg whites and sugar 5 tablespoons of powder snow. Into a suitable container caramelized 4 tbsp sugar and added to the egg white glaze while stirring. Spread cake with glaze and sprinkle with the walnuts.