Sieve flour, beat butter & sugar together.
In sugar & butter mixture add egg & beat again, now keep adding flour bit by bit & keep mixing and add vanilla too.
When this whole mixture gets mixed, wrap this dough in plastic & refrigerate it for 1hr after separating 1/4th part of the dough.
Take it out of the fridge and make a log out of it, and give it a shape of a bread by means of a stick. Then again refrigerate for 1hr.
Add coco powder & mix it in the dough you've separated. roll it and cover it over the white log you've prepared and refrigerate for 2hrs.
Take it out of the fridge slice them up and put it over a greased tray and bake it in a pre heated oven over 180°C for 15-20mins.
For icing, beat egg white, add in it icing sugar, vanilla essence & lemon juice, then beat till the formation of soft peaks. In 2tbsp icing add 2 drops yellow food colour for making egg yolk.
Fill up the piping bag with this icing and make it in a fried egg shape over the cookies after they get on to room temperature.
