Beat eggs, sugar and emilsifier until fluffy.
Add black glutinous rice flour and vanilli powder then stir well.
Enter melted margarine little by little, stirring gently.
Pour 18cm diameter round baking pan that has been smeared with margarine and covered with baking paper.
Steam 30-35 minutes until cooked using medium heat.
Cover steamer pot wrapped in a clean cloth so it does not drip water into the cake