1. raw materials of yeast steamed bread: flour 500g, yeast 5g, modifier 1g, baking powder 5g and water 300g. Practice: 1. Add baking powder and improver into noodles and stir well. Bake the chicken nest, add yeast and water and mix well to form a firm dough. Wake up 15 minutes. 2. Rub the strips, add 8 doses, knead them into steamed bread, wake them for 18 minutes, and steam them in cold water for 18 minutes.