Preheat oven to 400 degrees and line baking sheets with parchment.
Use a mixer to beat together butter and sugar.
Add in vanilla.
Sift together and stir in flours and salt.
Form 1 inch balls or crescent shapes.
Bake for 10 minutes, until light golden.
Allow to cool a few minutes, then roll in sugar.
Cool completely, and roll in sugar once more.