Ingredients :

​

* 1 pound (450g.)sweet (unsalted) butter,
* 1 cup (240ml) sugar,
* 4 hard-boiled egg yolks, finely crumbled
* 4 cups (920ml) white flour,
* 1 ½ teaspoons (7ml) vanilla extract.

​

Method :

​

Thoroughly mix the butter, sugar, egg-yolks and vanilla extract, then slowly mix in the flour and knead. If the mixture appears to be too liquid, add a little flour.
Place the kneaded ball into the refrigerator for at least 2 hours.
Roll out the mixture on a board until about ¼ inch thick (about 7mm) - this is the thickness of a standard pencil.
Cut strips about ¼inch wide and 6 inches (150mm) long, and twist into a figure-eight, like a pretzel. Break an egg, and smear the bow-ties. Sprinkle with colored sugar. (Alternatively, you may sprinkle with poppy seed instead).

Place on baking tray and insert into oven preheated to 350°F (180C) for 20 to 25 minutes.
Watch carefully towards the end as the cookies burn very easily.