How to shape the perfect bao dough
Some tips I found useful while making the second batch of bao: 


Start out by making small buns 
Use a rolling pin to even out the dough (should be about 3-4 inches in diameter)
Add just a small amount of filling to the center
Gather up all 5 sides (not 4!!) and pinch them together in the middle
Generously spray oil in baking cups, and place buns in cups (this way the buns won't stick to the steamer or to the baking cups) 
Steam for 15 mins, or freeze and steam at a later date for 20 mins