recipe: steamed brown sugar sponge cake (ma lai gao/马拉糕))

Ma lai gao (马拉糕) is a popular dim sum dessert, alongside the ever-popular salted-egg yolk custard bao. It's essentially a sponge cake with a beautiful caramel color due to the brown sugar, and because it's steamed, ma lai gao is a fluffy, soft and gorgeous cake (it will literally spring back if you push down on it!).