To Prep
In a mixer on a low speed setting, add the egg and sugar and mix till well combined before increasing to a medium to high speed and beating till the mixture has doubled in size.
Reduce the speed back down to a low and continue to beat for 2 mins to get rid of some of the air bubbles.
Remove the mixing bowl from the mixer and sift in the flour. Hand mix until well combined before pouring in to a baking tin lined with baking paper. Set aside to rest for 10 mins.
To Cook
Set the baking tin in to a steamer and let steam for around 40 mins or until the cake has cooked through.
When the cake has cooked, remove from the steamer and let cool.
To Serve
When the cake has cooled, cut in to several pieces and serve!