Preheat steaming kettle with the big fire

Pour all ingredients into a big bowl then mix by mixer during 10 minutes(note: have to be mixed precisely 10 minutes)

pour the dough into small paper cup until full

Steam it during 20 minute with the big fire (note: never open the kettle's cover during cake cooked)

After 20 minute, open the kettle's cover and see the cake. If you're lucky, there will be a big surprise that happened.