In large bowl, beat cream cheese with electric mixer on medium speed until smooth. Gradually beat in granulated sugar until fluffy. Beat in vanilla and liqueur. Beat in eggs, 1 at a time, until well blended. Pour in the cooled (but still pourable) melted chocolate, and beat until there are no more streaks and batter looks chocolaty. Add Bisquick mix, and beat until incorporated. Pour in milk, and beat until smooth and creamy.