PLACE cookies in single layer in 13x9-inch pan.
MICROWAVE caramels and milk in microwaveable bowl on HIGH 2 to 3 min. or until caramels are completely melted, stirring after each minute. Spoon over cookies; spread with spatula to form even layer in pan.
SPRINKLE with coconut; drizzle with chocolate. Let stand 10 min. or until caramel is firm before cutting dessert into bars.