LINE 8-inch square pan with foil, with ends of foil extending over sides. Microwave white chocolate and milk in microwaveable bowl on MEDIUM 2 to 3 min. or until chocolate is almost melted; stir until completely melted. Stir in food colourings until well blended.
SPREAD half the white chocolate mixture onto bottom of prepared pan. Sprinkle with chopped chocolate bars. Immediately top with remaining white chocolate mixture and sprinkles. Refrigerate 2 hours or until firm.
USE foil handles to lift fudge from pan before cutting into squares.
