I've never sold a cake book, but I've sold a lot of books, and I always put them on Amazon. Huge traffic and they don't charge you a fee unless it sells.
Check to see if your area has a "Half Price Books" store. They will buy them on the spot, but you probably won't get too much money for them. I buy a lot of cake books there, though. Someone even sold their Ace of Cakes book to them, I couldn't believe it was there, since it was brand new, and they let it go! 
Half Price Books only gives a couple of dollars...I quit taking books there after I took in over 100 paperbacks, all recent and in good condition, and they offered me three dollars for everything.
If you don't want to do craigslist, what about Kijiji?
Definitely Amazon...
Sold a bunch of real estate flipping and diet books awhile ago, not a single problem with any transaction.
The RE books came from Amazon...they were brand new and way more expensive than I normally like to pay. When I sold them, I got it all back. I didn't have to decrease the value just to unload them. I loved that!
Quote by @%username% on %date%
%body%