Pork floss buns easy to make recipe these buns are a grab-and-go street food in China. They were also popular in our Test Kitchens, where they earned our highest rating. Use a multitray bamboo steamer so you can cook all the buns at one time. To make them up to two months ahead, fill the dough, and freeze unsteamed buns on a tray in the freezer before placing them in a freezer-safe zip-top plastic bag. Steam directly from the freezer for an additional five minutes. This Chinese recipe is proof you don't have to get takeout to enjoy the fine cuisine.