Serious Eats
Brains: The Core of the Zombie Diet
If you're a zombie, be sure to follow the Zombie Food Pyramid to remain at peak human-eating condition. You wouldn't want your arm to fall off while cracking into a fresh human skull now, would you? Be sure to eat plenty of brains, but go light on the bones and gristle.
The drawing appears to have been originally made by Mike Capen for Threadless.com. For another take on the nutritional needs of zombies, read this zombie health article from The Onion.