I browsed the web for some simple recipe and came across DG's blog. I did a little modification coz i'm making Pandan version instead of Matcha.
1/2 cups Caster sugar
1.5 cups Self-raising flour
1 tsp Pandan Paste
50ml 7-Up or Sprite
Use high speed beat eggs till fluffy, add in sugar and beat till soft peak
Add in Pandan Paste till no "marble-effect"
Fold in Flour till well-combined
Add in 7-up till well-mixed
Pour into cups/moulds
Steam for 15mins