1Heat oven to 350ºF. Mix brown sugar, butter, water and vanilla in medium bowl. Stir in flour and salt. Shape dough into twenty 1 1/4-inch balls.
2Place pretzel rod halves on ungreased cookie sheet. Press ball of dough onto cut end of each pretzel rod. Press dough with fork to resemble "bristles" of broom.
3Bake about 12 minutes or until set but not brown. Remove from cookie sheet. Cool completely on wire rack, about 30 minutes.
4Cover cookie sheet with waxed paper. Place brooms on waxed paper. Heat shortening and chocolate chips over low heat, stirring occasionally, until melted and smooth; remove from heat. Spoon melted chocolate over brooms, leaving about 1 inch at top of pretzel handle and bottom halves of cookie bristles uncovered. Drizzle with melted butterscotch chips. Let stand until chocolate is set.