4
Fill a large saucepan with 1 to 2 inches water. Place steamer basket of same diameter on top of saucepan, making sure water does not touch basket. Bring water to boil over medium heat. Working in batches, transfer buns from paper liners to bottom of the steamer basket, placing 1 to 2 inches apart. Cover; steam 10 to 12 minutes or until buns are light and airy. Add additional water to the saucepan as needed.