01 - Beat softened cream cheese in large mixing bowl until smooth and creamy texture achieved.
02 - Incorporate powdered sugar and vanilla extract; beat until fully combined and mixture becomes fluffy.
03 - Whip cold heavy cream in separate bowl until stiff peaks form consistently throughout.
04 - Gently fold whipped cream into cream cheese mixture until smooth and uniform consistency reached.
05 - Add strawberries, blueberries, and mini marshmallows; fold gently to combine ensuring even coating.
06 - Refrigerate minimum 1 hour before serving for optimal texture and flavor development.
07 - Serve chilled; optionally garnish with additional fresh berries for enhanced visual appeal.