PREHEAT oven to 375° F.
BEAT butter, 3/4 cup powdered sugar and salt in large mixer bowl until creamy. Beat in vanilla extract; gradually beat in flour. Stir in chopped Crunch bars. Shape dough into 1 1/4-inch balls. Place on ungreased baking sheets.
BAKE for 10 to 12 minutes or until cookies are set and bottoms are lightly browned.
SIFT 1/4 cup powdered sugar over hot cookies on baking sheet; cool on baking sheets for 10 minutes. Carefully remove to wire racks to cool completely. Sprinkle with additional powdered sugar if desired. Store in airtight containers.