Molten Salted Custard Buns 流沙包 (9)A delicious, slightly salted custard bun. Creating a savory sweet filing perfect for ending off your Dim Sum meal. The main difference between a custard bun () and a salted custard bun () is the slight savory taste that rounds out the sweetness. The Custard filling for the salted buns are runnier and run similarly to how Lava would drip down a volcano. 8 Pieces per order Cooking Instructions 1. Steam the buns from frozen in a steamer or a bamboo