Bao buns will take about 8 minutes in a steaming basket set over simmering water. If you don’t have stackable bamboo steaming baskets (my favourite), you can use any type of metal or silicone steaming basket. If you don’t have any type – use your colander. Whatever you use, make sure to cover it with a lid of some kind. Bamboo baskets come with their own lid but the other options can just be covered with foil. Also, make sure to place a piece of baking paper under each bao, so they don’t stick to your steamer.