Heat oven to 350 degrees. In a medium saucepan, combine chocolate chips and butter; cook and stir over low heat until chips are melted and smooth. Add sweetened condensed milk; mix well. In a medium bowl, combine flower, nuts, chocolate mixture and vanilla; mix well. Shape 1 tablespoonful (use a measuring spoon) of dough around each candy kiss, covering completely. Place 3 cm apart on ungreased cookie sheets. Bake at 180ºC or 6 to 8 minutes. Cookies will be soft and appear shiny but become firm when cool. Do not overbake. Remove from cookie sheets. In a small saucepan, combine white baking bar and shortening; cook and stir over low heat until melted and smooth. Drizzle over cookies. Store in tightly covered container. Makes 5 dozen cookies."