Cupcake Jake's is a parody of GiGi's Cupcakes. It is the cupcake company that produced the box of cream-filled red velvet cupcakes Carly, Sam, and Freddie had in the episode iFind Lewbert's Lost Love. Sam sucked the cream filling out of all the cupcakes, much to the annoyance of Carly and Freddie.
Carly: You call Cupcake Jake's right now and order us 12 more of these.
Sam: I ate all the stuffing!!