Blend the walnuts, but do not crush them too much.
Beat the cream cheese with a mixer on low speed for 10 seconds, then gradually add powdered sugar and beat on low speed.
Melt the chocolate, cool it a little, and add it to the cream cheese, add vanilla sugar, and mix it well.
Put the mixture in the fridge for 1 hour to harden.
Make balls of the desired size and roll them in cocoa and walnuts.Bon Appetit!