Place the butter and sugar into the bowl of a stand mixer.
Using the flat paddle attachment, cream the butter and sugar until light and fluffy.
Add the egg yolks, vanilla extract and salt.
Add a few tablespoons of the flour mixture at a time to the bowl and incorporate on slow speed.
Once all of the flour has been added, add a bit of the cold water (you may not need all of it) and mix until everything comes together into a soft ball.
Add the chocolate chips and incorporate this into the dough.
Place the dough between two sheets of baking paper and roll until the mixture is about 1 cm thick.
Place the rolled out dough in the fridge to chill for at least 30 minutes.
To Bake the Cookies
Preheat the oven to 180°C/350°F (without fan).
Use a large round cookie cutter to cut out shapes from the dough and transfer them to a baking sheet lined with baking paper. I used an 8 cm (3 inch) round cookie cutter, but you can make the cookies any size you like.
Bake the cookies for about 15-20 minutes, or until they are lightly golden.
Let the cookies rest on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
Kitchen Notes
SUGAR CONTENT This recipe comes from my husband's great-aunt. Her recipe contains 50 g (4 tablespoons) of sugar, and the cookies are less sweet than American-style cookies. I have doubled the quantity of sugar in my recipe above, but you can adjust the sugar quantity as you wish.
STORAGE TIPS The cookies keep well in an air-tight container for several days.
OVEN TEMPERATURES All recipes on this website state temperatures for a regular oven (i.e. a conventional oven without fan). If you have a convection oven with a fan, please consult the manufacturer's handbook on how to adjust the temperature and baking time accordingly.