Preheat
oven to 300 degrees F. Soften butter to room temperature.
Cream
butter, add sugar and beat until fluffy. Stir in vanilla.
Add
flour and stir until combined. Mix in the chopped pecans.
Roll
into small balls and place on an ungreased cookie sheet.
Bake
for 15 - 20 minutes, until the bottoms are golden brown.
Put
some white sugar in a small bowl. While hot, roll each
cookie in the sugar to coat, and set on a rack or plate
to cool.