Cupcakes on Entourage? Help a girl out

So I know that Sprinkles Cupcakes made an appearance on Entourage. Apparently Ari bought them to try to woo a casting agent.

But it's definitely an episode I haven't seen (I am basically TV-illiterate and never watch, but I do rent some things on DVD).

Can anyone tell me which episode? I'm trying to find the clip on YouTube, but having little luck.

Thanks! Comment here or write me at rachelkb at gmail.com