2. First, separate the egg protein from the yolk. Mix the egg yolk and milk and stir well for later use. Add sugar to the egg white and beat with an egg beater for 10 minute. Be patient and foam the egg whites. Mix the egg and milk mixture with wheat flour, add yeast and stir into batter. When the batter is ready, add the beaten egg whites and continue stirring until it is completely mixed. Bake and cook until the cake is hot.