A method of defrosting a food item, including: monitoring a temperature of a first part of a first food item； and controlling a surrounding temperature of the first food item in dependence on said monitored temperature. The controlling includes: decreasing the surrounding temperature of the first food item, using an unheated fluid having a temperature less than the surrounding temperature of the first food item, when the surrounding temperature is greater than a target surrounding temperature for a given temperature of the first part. Embodiments also relate to a control system, apparatus and computer software.
