1. Prepare flour, black whole wheat flour, baking powder and add appropriate amount of warm water to knead the noodles.
2. Stir it into floc
3. Prove the dough for one hour
4. Divide into several parts
5. Roll the skin
6. Brown sugar filling
7. Made into buns
8. Proof again in the cold water pot for 10 minutes
9. Boil the water and steam until about 20 minutes
10. Load into the disk
