Heat oven to 400 F. Remove wrappers from chocolate pieces. In large mixer bowl, beat butter, powdered sugar amd vanilla until well blended. Stir together flour and salt; gradually add to butter mixture, beating until well blended. Add nuts; blend well. Mold scant tablespoon dough around each chocolate piece, covering completely. Shape into balls.
Place on ungreased cookie sheet. Bake 10-12 minutes or until set. Cool slightly; roll in powdered sugar. Cool completely. Before serving, roll again in powdered sugar, if desired.
NOTE: To toast almonds, heat oven to 350 F. Spread almonds in thin layer in shallow baking pan. Bake 8-10 minutes, stirring occasionally, until light golden brown; cool.