a process for producing pumpable foodstuffs , wherein raw foodstuffs such as raw cheese is pre - comminuted , mixed with further ingredients , thermally treated by steam injection , subsequently cooled and creamed or emulsified and then fed or passed to a further working or processing operation . the present invention further relates to an apparatus for producing pumpable foodstuffs , such as processed cheese , having a treatment apparatus for raw foodstuffs , a mixer , a device or unit for heating and subsequently cooling the cheese mass and having feed pumps for the cheese mass .