If you need a cheaper option, I found Vanilla Bean cupcakes at IOA. I don't remember the name of the shop, but it was a candy shop in Port of Entry, between the bakery and the park exit, on the opposite side from Islands of Adventure Trading Company (the big gift shop). I didn't get into the bakery, so I don't know if they had them. I didn't get to Universal Studios, so I don't know if they have them either.
They took the cupcake out of the display case and put it in a great plastic container which had little things inside that made the cupcake stand upright so it didn't get squished when I took it back to the hotel.