Cream butter sugar and
salt until light and fluffy.
Add egg yolks one at a
time, then vanilla mixing well after each addition.
Add flour and mix just
Divide dough into two
equal portions, wrap and refrigerate at least 2 hours.
When ready to bake,
preheat oven to 375 degrees.
Roll out half of the dough
on floured board to between 1/8 and 1/4 inch thickness and cut with
Line cookie sheets with
parchment paper and transfer cookies to cookie sheets.
Bake for 12 minutes or so,
until cookie just start to brown around the edges. Be careful not to
Remove from oven, transfer
cookies to wire racks and dust with powdered sugar or let cool, then
decorate with frosting if desired.