In large bowl, beat cream cheese with electric mixer on medium speed until smooth. Decrease speed to low; slowly add 1/2 cup of the milk. Beat in dry pudding mix, scraping bowl as needed. Slowly with mixer running, add remaining 1 1/2 cups milk; beat until well blended. Beat in whipped topping. Spread on top of cooled brownie base. Drizzle chocolate syrup in random pattern over top of bar. Pull table knife through topping for ripple design.