Senior Station Officer Sulu Devoe said the blaze spread from the kitchen to the dining area because firefighters had not been able to locate the fire based on the directions given by evacuated staff.
"It took a while to locate the fire because [the building] was heavily smoke-logged."
Mr Devoe said the blaze caused "significant damage", completely destroying the kitchen and spreading into the dining area, where it burned some chairs, tables and benches.
The university said the building was evacuated promptly.
Incident controller Dave Woon said it was fortunate no one was injured given the number of people on campus.
The incident went to a fourth alarm - the most serious category of fire - and 16 fire appliances from surrounding stations attended.
The campus will be open today and classes have been rescheduled.