I’ve got very old book in my collection. It has got 30 years and it is textbook for trade schools titled „Making cookies”. I’s written by Czesław Dojutrek and Andrzej Pietrzyk. Besides some theoretical informations for beginning confectioners there are many great and very easy recipes – just like that one for those adorable little piano-keys. The taste of those cookies I remember from high school – they always were in nearby confectionery.
340 g flour
185 g margarine
45 g icing sugar
2 egg yolks
few drops of vanilla essence
Mix margarine with sugar until it’s homogeneous. Then add yolks, vanilla essention and flour. After mixing it all together it comes to loose crumbs. Lay crumbs on the table and knead quickly. Roll out into about 1 cm thick rectangle and then put it into the fridge for an hour.
Mix egg white with icing sugar until it’s like very thick icing. Take the knife and spread the icing on cooled douch with it. Now leave it for 30 minutes and let the icing get dry.