melt chocolate chips with condensed milk and salt in heavy saucepan over low heat.
remove form heat stir in vanilla and chopped white baking pieces. stir just until blended.
Line and 8-9 inch square pan with waxed paper. Spread fudge mixture evenly into pan. Chill 2 hrs or until firm. Turn fudge onto vutting board; peel off paper and cut into squares. store leftovers in fridge.