This isn’t a huge offering, but this cupcakery has a special vegan cupcake on Mondays. So if you are in the area on that day of the week, you can stop in for a dairy-free, egg-free delight.
They do offer special order and delivery of their cakes and cupcakes, so I am assuming that they can do special order vegan cupcakes.
Back Bay: 49 Massachusetts Avenue Boston, MA 02115 617 247 CAKE (2253)
Harvard Square: Zero Brattle Street Cambridge, MA 02138 617 547 CAKE (2253)