1, celery can usually be blanched for one or two minutes. If blanching time is too long, the taste and nutrition of celery may change. Blanching celery can remove some sour taste and make fried food taste better.

2. It's no problem if celery is not blanched, but the taste will be slightly inferior. Blanching can not only remove the astringency of celery, but also remove some peculiar smell and residual pesticides. When using celery as a cold dish, you must blanch it. If you are just cooking, you can choose to omit this step, because high temperature can also remove the astringency of celery when cooking.