In a mixing bowl, stir the soft butter to light. Add icing sugar and mix well and add egg yolk, mix well again.
Sieve in flour ingredients and cocoa powder, add almond meal, fold well with a rubber spatula.
Lastly add in chopped walnuts and mix well to form a soft dough.
Roll dough into small balls (put on plastic gloves), about 10-12g each and place on a lined baking tray. Bake in preheated oven 170 deg C for about 20 minutes
Cool down cookies completely and dust some icing sugar over it.
Recipe by Anncoo Journal at https://www.anncoojournal.com/chocolate-snowball-cookies/