01 - Beat softened cream cheese in large mixing bowl until smooth and creamy texture is achieved
02 - Incorporate powdered sugar and vanilla extract, beating until fully combined and mixture becomes fluffy
03 - Whip cold heavy cream in separate bowl until stiff peaks form
04 - Gently fold whipped cream into cream cheese mixture until smooth and uniform consistency is reached
05 - Add strawberries, blueberries, and mini marshmallows. Fold gently to combine, ensuring even coating of all ingredients
06 - Refrigerate for minimum 1 hour before serving to allow flavors to meld and achieve optimal texture
07 - Serve chilled, garnished with additional fresh berries if desired