Our friends son had a zombie party and his mom made awesome cupcakes.
she bought these Zombie hands
made chocolate cupcakes... topped with oreo cookie crumbs (to look like dirt). Then she placed a Milano cookie in it and wrote RIP in lime green (to look like a headstone) and had the zombie hand popping up in front of the headstone. Everyone thought they were great!
This mom went ALL OUT!
Etsy has a few things
Here is a pinterest that has lots of plants vs zombies stuff
just checked the photo I had from the party and the writing on the milano cookie headstones was actually just brown or black... wish I could share a pic... they are on facebook.