Remove stems from berries.
Cut strawberries into small pieces (similar in size to the mini marshmallows); set aside.
Prepare the berries before mixing the cheesecake mixture as it will start to set up pretty quickly once mixed.
In a very large bowl, beat cream cheese, vanilla, salt and confectioners sugar until smooth and creamy.
Add half of the Cool Whip; stir until smooth.
Fold in remaining Cool Whip.
Fold in strawberries, blueberries and mini-marshmallows; transfer into a resealable container and place in the refrigertor until ready to serve.
