That incredible brownie smell in Millbrae

I moved from SF to Millbrae a few months ago. Don't get me started..I'm taking Caltrain to work, and there is this INCREDIBLE smell of brownies right around the Caltrain station on El Camino. The smell is there some mornings, and some nights.

Following my transplanted NYer nose isn't working, and I must must must have those brownies. Where are they? Peter's? It can't be Trader Joes, Safeway or 7-11.

thanks

jb