kollelman:
The custom of Birchas Habonim on Friday night appears to have been well known and widespread in earlier generations. However, virtually every reference I have seen on the subject refers to the brocho being given by the father. I have no problem accepting that a mother can also bentch children, and would actually consider this something I would invite and appreciate. But I have never seen it referenced. Secondly, even the references to the Ari Zal do not have any mention of preparing the hand to give the brocho. It sounds like a nice thought. Where did you find it?