I've tried following this recipe to bake a Strawberry Shortcake - http://kitchentigress.blogspot.sg/2013/12/japanese-strawberry-shortcake.html
I've tried it at least 3 times, but after each time of baking, the sponge cake sinks and flattens.
Kinda at my wits' ends. Not sure what else I can do it. Appreciate any help. Thank you :)