1Heat oven to 375°F. In large bowl, stir cookie mix, oil, water and egg until soft dough forms. Onto ungreased cookie sheets, drop dough by rounded measuring tablespoonfuls 2 inches apart.
2Bake 9 to 11 minutes or until set. Cool 1 minute; remove from cookie sheets to cooling racks. Cool completely.
3Line cookie sheet with waxed paper. Dip snacks in melted candy; tap off excess. Place on cookie sheet. Refrigerate until firm.
4Reheat remaining candy melts, if necessary. Frost each cookie with melted candy to look like a puddle. Immediately attach 1 pretzel piece to each cookie; sprinkle shredded cereal onto bottom of pretzel to look like broom bristles. Dip wide end of each chocolate-coated snack in melted candy; place upright in center of each cookie for hat. Let stand until set.