Although the frosting-to-cake ratio is nothing short of cloying, you can pick up a cupcake this afternoon at Justin Herman Plaza. Sprinkles (@sprinklesmobile), a cupcake van, is right next to the funky water sculpture in downtown San Francisco, across from the Ferry Building. So, have at it, sweet teeth of SF.
What's more, according to Eater, Kara's Cupcake truck, which looks almost exactly like the Sprinkles van, "happens to be parked in the same plaza (as it often is)" today too. That is to say: It's on.