Yes, in my career in retail management, prior to my working at home, I always brought food for meetings, during stressful events, and just for morale. Food is basically a cheap and easy way to increase goodwill in my book.

I have often wished my therapist worked closer to me so I could bring her treats. I think it's a nice way to express consideration and caring without doing anything too extravagant that might set off boundary-crossing warning bells.