01 - Beat softened cream cheese in large mixing bowl until smooth and creamy texture achieved.
02 - Add powdered sugar and vanilla extract; beat until fully incorporated and fluffy consistency forms.
03 - In separate chilled bowl, whip cold heavy cream until stiff peaks form, approximately 3-4 minutes.
04 - Gently fold whipped cream into cream cheese mixture using rubber spatula until smooth and uniform, taking care not to deflate air pockets.
05 - Add quartered strawberries, blueberries, and mini marshmallows; fold gently to combine until evenly distributed throughout creamy base.
06 - Refrigerate mixture minimum 1 hour to allow flavors to meld and achieve optimal texture.
07 - Serve chilled in individual bowls or decorative serving dish; garnish with additional fresh berries if desired.