Cut 15 cm x 15 cm (6″ x 6″) squares out of baking paper.
Divide the Banh Bao dough into equal segments and roll them into balls. Cover using a cloth as you work on each to avoid drying.
Flatten each ball into a circle approximately 20 cm (8″) wide using a rolling pin or a smooth cup.
Place a meatball in the center of the flattened dough.
Bring the top and bottom parts of the Banh Bao dough in and pinch to stick together over the meatball.
Repeat the same steps with the left and right sides of the rolled dough.
Where the openings are for each corner, push the tips in to form a heart shape. You'll end up with four hearts.
Pinch each heart's tips to close the openings.
Hold one pinched tip and pull it to the center, pinching it with the dough in the middle to allow it to stick. Repeat with all pinched tips.
Give the center one final pinch to seal all the dough.
Place the wrapped bun on a baking square.
Set up your steamer to a boil and steam the baos for 30 minutes or until the meatball is cooked.Note: Alternatively, steam the meatballs before wrapping and steam the whole bao for 10 minutes or until the Banh Bao dough is cooked.
Serve fresh as is or with a drizzle of Sirarcha!