PREPARATION METHOD: Melt butter with chocolate in a bain-marie. Take it off from fire and let it cool down. Mix the eggs in a bowl with yolks, flour and sugar and whip it, until obtaining a foamy mixture. Then add melted chocolate with butter and blend. Put the mixture in buttered shapes and put them in freezer for 2 hours. After that, take them out the freezer and cook them in a heated oven at 190° for 12-14 minutes. Take them out of the oven, take off the shapes, and serve immediately.