Is it permissible for a mother to give Zakat to her married daughter who does not work, and whose husband is well-off?

It is not permissible to give Zakat to one's ascendants or descendants, according to the majority of scholars. Your daughter is not eligible for Zakat as long as her husband is wealthy and her maintenance is obligatory upon him, unless she is among the indebted or is poor with no one to support her.