There are many reasons for dough yellowing. If flour we use is dried due to moisture, it may turn yellow. If our flour is homemade, it will turn yellow without fine processing. In addition, excessive soda and alkali in flour will also cause the steamed dough to turn yellow. There are many reasons why dough yellowing can lead to the yellowing of kneaded dough. If the flour in our home has been damp due to improper placement, it may turn yellow after drying.
Secondly, many flour without fine processing is a little yellow. If the flour we buy is homemade, it is normal for it to turn yellow.
In addition, if we put too much soda or alkali into the flour when kneading, it will also cause the dough to turn yellow after steaming, which is also normal.