Preheat the oven to 180 deg C and lightly grease the baking trays .
In a large mixing bowl , beat together the butter , sugar, vanilla extract and salt .
Beat in the almond flour and the all purpose flour .
Scoop about a teaspoon of dough and roll them into balls .
Place the balls on the prepared baking trays, space them at about 1” apart .
Bake the cookies for 15 - 20 minutes or until they feel set on top . They should be lightly browned .
Put the confectioners sugar in a shallow bowl .
Remove the cookies from the oven and allow them to cool.
Transfer 4-5 cookies at a time and roll them in the sugar to coat .
Transfer to a rack to cool .
After the cookies cool down , roll them again in sugar . They should be generously coated and snowy white .
Store in a airtight container at room temperature for up to a week .