A process for producing a set expanded foodstuff comprises the step of passing a soft expanded foodstuff composition at a first temperature and a first pressure into a setting region at a second temperature, the second temperature being lower than said first temperature. The soft expanded foodstuff composition is cooled and set in the setting region at a second pressure which is lower than said first pressure. A process for producing a set expanded foodstuff, comprises the steps of passing a soft foodstuff composition which may be in at least a partially expanded condition and which contains a vaporisable expandingagent, at a first temperature and a first pressure into a setting region at a second temperature, said second temperature being lower than said first temperature. The soft foodstuff composition is cooled and set in the setting region at a second pressure which is lower than said first pressure so as to expand or further expand the foodstuff composition by evaporation of the vaporisable expanding agent.