In 4-cup glass measuring cup, mix broth and whipping cream. Gradually stir broth mixture into saucepan. Increase heat to medium-high; heat to boiling, stirring constantly. Boil and stir 1 minute; reduce heat to medium. Add cream cheese and cook until melted, beating occasionally. Remove from heat. Stir dressing mix into sauce mixture. Pour 1 cup of the sauce into bottom of baking dish, spreading to cover.