“What do ghosts put on their mashed potatoes?”/“Grave-y.”

“Grave-y” (gravy) is a typical Halloween dish. “Boned foul with grave-y” was a Halloween menu selection printed in an October 1961 newspaper.
 
“What do ghosts put on their Christmas turkey? Grave-y” was printed in a 2007 book. “What do ghosts like on their roast beef???  GRAVE-Y!  I luv Laffy Taffy jokes” was posted on Twitter on February 11, 2009. “What do ghosts put on their mashed potatoes??? GRAVE-Y!!” was posted on Twitter on May 9, 2011.
 
“What do ghosts put on their bagels?”/“Scream cheese” is a similar ghost riddle.
   
   
27 October 1961, The Arizona Republic (Phoenix, AZ)< Don Dedera column, pg. 21, col. 1:

... and a menu of Hungarian ghoul-ash, deviled eggs, boned foul with grave-y, and peasant under glass.
 
27 October 1982, Boston (MA) Globe, “Kids’ Cooking: A few tricks produce a lot of treats for Halloween Give your party some punch” by Susan Manlin Katzman, pg. S37, col. 1:
Spook-ghetti, ghoul-ash, or ghost beef and grave-y are just the things to make people say that you are “the ghost-ess with the mostest!”
 
Google Groups: alt.creative.writing
What does a ghost eat?
omjaram
10/21/04
(...)
Lovely. I know you won’t be able to resist goblin up this full-corpse meal. Bone appetit!:
 
Grains
Ghost Toasties      
Scream of Wheat
Pentagram Crackers with Poisonbury Jam      
Brain Muffins
                   
Entrees
Hungarian Ghoul Ash  
Frank ‘n’ Stein
Stake Sandwitch      
Halloweenie
Grave-y
Littleneck Clams      
Black Catfish
Warlocks and Bagels, with Scream Cheese      
                   
Side Dishes
Spook-ghetti          
Deviled Eggs
Artichokes            
Skullions
Scarrots                
Ghost Liver Pate
                   
Fruits
Adam’s Apples          
Nectarines
                   
Desserts    
I Scream
Boobury Pie              
Boo Meringue          
Ghoul Whip
Terrormisu            
Ladyfingers
Ghoulda Cheese        
Monster Cheese
                     
Beverages
Ghoul Ade
Coffin with Scream
Zombie
Apple Spider
 
Google Books
Hilarious Halloween Jokes
By Alison Grambs
Illustrated by Steve Harpster
New York, NY: Sterling Publishing Company, Inc.
2005
Pg. 31:
What’s another tasty treat at cemeteries?
Mashed potatoes and grave-y.
 
Google Books
Puns Spooken Here:
Word Play for Halloween

By Richard Lederer
Illustrations by Jim McLean
Layton, UT: Wyrick & Company
2006
Pg. 12:
Grave-y.
 
Google Books
The Whopping Great Big Bonkers Joke Book
By Puffin Books
New York, NY: Puffin Books
2007
Pg. ?:
What do ghosts put on their Christmas turkey?
Grave-y.
 
Twitter
Daisy the Curly Cat
‏@DaisyCurlyCat
One more: Where should you bury your Thanksgiving potatoes (if they die)?  ......  In a GRAVE-y!
9:02 AM - 27 Nov 2008
 
Twitter
Stacey Wacknov
‏@gritsnyc
What do ghosts like on their roast beef???  GRAVE-Y!  I luv Laffy Taffy jokes.
10:28 PM - 11 Feb 2009
 
Twitter
Bollywood Sargam
‏@bollywoodsargam
Christmas jokes - 2860 Joke: What do vampires put on their turkey at Christmas ?
Grave-y ! .... http://tinyurl.com/nj7o9k
4:12 PM - 23 Jun 2009
 
Twitter
James Macey
‏@mace5681
just found out ghosts like their mashed potatoes with grave-y.
11:48 AM - 10 Aug 2009
 
Twitter
Lynn
‏@jerseygirlz28
My daughter: what do skeletons put on their mashed potatoes?
8:50 PM - 26 Aug 2010
 
Twitter
Hilary Wagner
‏@HilaryWagner1
@lchardesty What do ghosts put on their mashed potatoes??? GRAVE-Y!! Bwaahh! You’re welcome! #dumbjokes 😉
5:18 PM - 9 May 2011
 
Twitter
Halloween Jokes
‏@halloweenjokes
Funny Halloween Jokes - What do zombies put on their mashed patotoes? GRAVEy.
4:32 AM - 31 Oct 2012
 
Twitter
-
‏@stlesdunkirk
what do skeletons put on their mashed potatoes?
grave-y!
5:29 PM - 20 May 2014
 
Twitter
softBOOtch john cena
‏@aardvarkwizard
hey that reminds me of a joke. what do ghosts put on their mashed potatoes? gravey. hahaha
3:30 PM - 29 Jul 2014
 
Google Books
Happy Halloween Jokes 6
By Peter Crumpton
PeteyRF Creative
2015
Pg. ?:
How does Dracula like his meat?
In grave-y.