1Line 8-inch square pan with foil, leaving foil overhanging at 2 opposite sides of pan; spray foil with cooking spray. In 2-quart saucepan, heat condensed milk, chocolate chips and butter over medium heat 6 minutes, stirring frequently, until smooth. Remove from heat; stir in vanilla. Fold in chopped malted milk balls and pretzels.
2Pour mixture into pan, spreading evenly with spatula. Top with candy corn, pressing gently to adhere. Refrigerate 1 hour or until firm. Use foil to lift from pan. Cut into 5 rows by 5 rows. Store covered in refrigerator.