Measure and mix all the ingredients in a large bowl.

Transfer the batter into the baking tin. (Of couse you need to butter the tine or line your pachment paper)

Cover the tin with plastic wrap, rest the batter in the fridge for about an hour.

Take the batter out and remove the plastic wrap when you are pre-heating your steamer.

Cover the tin with aluminum foil and put inside the steamer once the water starts boil. Steam-baked for about 35 minutes.