Salted egg yolk custard bun or Liushabao ( 流沙包 )is always my kids favorite Cantonese dim sums. These salted egg yolk custard buns were introduced to them at a dim sum restaurant, as part of our monthly ritual when they were young. My son took a bite out of it before it cooled down, almost burning his lip. This Liu Sha Bao is airy and light, with a delectable quicksand filling in the middle made of sugar, butter, and salted egg yolk. The filling is frozen during the filling process to make it easier to wrap within the bun. After being steamed, it turns liquid. You'll know what I mean when you crack open the bao and see the luscious, silky yolk pouring out! Kindly remember that the filling needs to be frozen for at least two hours before wrapping, it is best to prepare the filling before the dough. Shape the filling in a ball form after two hours and place it back to the freezer. I even kept it overnight in the freezer after it was shaped. Remove it from the freezer only whil