Russian Tea Cakes

Heat oven to 400 degrees F.
Beat butter, 1/2 cup powdered sugar and the vanilla in large bowl with electric mixer on medium speed, or mix with spoon.
Stir in flour and salt.
Stir in nuts.
Shape dough into 1-inch balls.
Place about 2 inches apart on ungreased cookie sheet.
Bake 8 to 9 minutes or until set but not brown.
Immediately remove from cookie sheet; roll in powdered sugar.
Cool completely on wire rack.
Roll in powdered sugar again.