01 - Beat softened cream cheese in large mixing bowl until smooth and creamy texture achieved
02 - Add powdered sugar and vanilla extract to cream cheese; beat until fully incorporated and mixture becomes fluffy
03 - In separate chilled bowl, whip cold heavy cream using electric mixer until stiff peaks form
04 - Gently fold whipped cream into cream cheese mixture using rubber spatula until smooth and uniform consistency reached
05 - Add quartered strawberries, blueberries, and mini marshmallows; fold gently to combine ensuring even coating of all components
06 - Refrigerate assembled salad for minimum 1 hour to allow flavors to meld and texture to set properly
07 - Serve chilled in individual bowls or serving dish; garnish with additional fresh berries if desired