A dough conditioning apparatus for frozen dough including: an enclosure; at least one tray or conveyance for supporting at least one frozen dough piece within the enclosure; a means to direct a conditioning gas directly onto frozen dough within the enclosure; humidity and temperature sensors for respectively measuring the humidity and temperature of the conditioning gas; and a gas controller, the gas controller controlling the duration of the conditioning gas onto the frozen dough according to the output of the humidity and temperature sensor.