Cream butter.
Add sugar; cream together and add vanilla.
Add flour and salt and mix well by hand.
Add chopped nuts and work in. Dough forms a large ball.
Divide dough into 3 parts; divide each part into 10 pieces. Roll each piece and shape into a crescent.
Place on ungreased cookie sheet.
Bake at 350 degrees for 10 to 15 minutes.
Let cool; dust with confectioners sugar.