01 -
Set your oven to 350°F (175°C). Put some parchment paper on your baking tray.
02 -
Mix the soft butter with confectioners' sugar in a big bowl until it's smooth and airy.
03 -
Stir in the flour and chopped walnuts into your butter mixture until you get a nice soft dough.
04 -
Break off bits of dough and roll them into 1-inch (2.5 cm) balls. Space them out evenly on your lined baking tray.
05 -
Let them cook for 25 minutes until the bottoms turn golden but the tops stay light.
06 -
Let the cookies cool just a bit, then roll them in extra confectioners' sugar while they're still warm. Put them on a wire rack to cool fully, then roll them again in sugar once they're completely cooled.