In a bowl, mix 1 cup of glutinous rice flour, ¼ cup of corn starch, ½ cup of confectioners’ sugar, and 1/3 cup of vegetable oil. Add about ½ cup of water, mix well.
Use a kitchen towel to cover the lid of the pot. It will prevent the water on the lid drop into the dough while steaming.
Add the dough mixture to the steamer. Cover it up and steam for 10 minutes. Make sure not to open the lid during these 10 minutes, otherwise it will decrease the temperature inside.
10 minutes later, take the plate out of the steamer. When it is still hot, use a silicone spatula to take the dough out of the dish.
While waiting for the dough to cool down, use a plastic film to surround the dough to prevent it from drying out.