“Mozzarella” cheese is sometimes jokingly called “monster-ella” or “monsterella.” A Halloween riddle was posted in Boys’ Life in September 2009:
 
Q: What is a goblin’s favorite cheese?
A: Monster-ella!
 
“Mozzarella is a cheese: we call it Monster-ella, just as Muenster is Monster cheese” was in the book Letters To Jenny (1993) by Piers Anthony. “What is Bigfoot’s favorite cheese? Monster-ella” was cited in a 2004 joke book.
 
   
Wikipedia: Mozzarella
Mozzarella (English /ˌmɒtsəˈrɛlə/; Italian: [mottsaˈrɛlla]) is a southern Italian cheese traditionally made from Italian buffalo milk by the pasta filata method. Mozzarella received a Traditional Specialities Guaranteed certification from the European Union in 1998. This protection scheme requires that mozzarella sold in the European Union is produced according to a traditional recipe. The TSG certification does not specify the source of the milk, so any type of milk can be used. In Italy mozzarella made with the milk of the Italian water buffalo is an important variety.
   
Google Books
Letters To Jenny
By Piers Anthony
New York, NY: Tor
1993
Pg. 120:
Mozzarella is a cheese: we call it Monster-ella, just as Muenster is Monster cheese.
 
Google Books
Beastly Laughs:
A Book of Monster Jokes
By Mark Moore
Minneapolis, MN: Picture Window Books
2004
Pg. 5:
What is Bigfoot’s favorite cheese?
Monster-ella.
 
Google Books
September 2009, Boys’ Life “Think & Grin,” pg. 60, col. 1:
Race: What is a goblin’s favorite cheese?
Nathan: What is it?
Race: Monster-ella!
Daniel Race Bares, Tyler, Tex.
 
Google Books
Screaming with Laughter:
Jokes about Ghosts, Ghouls, Zombies, Dinosaurs, Bugs and Other Scary Creatures
By Michael Dahl
Minneapolis, MN: Picture Window Books
2011
Pg. 29:
What is Bigfoot’s favorite cheese?
Monsterella.
 
Twitter
Halloween Jokes
‏@halloweenjokes
Happy Halloween Jokes 2012 - What is a goblin’s favorite cheese? Monster-ella!
4:12 AM - 31 Oct 2012
 
Google Books
Rib-Tickling Riddles
Illustrated by Kevin Rechin
Columbus, OH: Highlights for Children, Inc.
2012
Pg. ?:
What is a ghoul’s favorite cheese?
Monsterella.
 
Facebook
Ritz Crackers
October 30, 2014 ·
What’s a goblin’s favorite cheese?
Monster-ella!
 
(Trademark)
Word Mark MONSTERELLA
Goods and Services (CANCELLED) IC 030. US 046. G & S: pizza. FIRST USE: 19980919. FIRST USE IN COMMERCE: 19980919
Mark Drawing Code (1) TYPED DRAWING
Serial Number 75565595
Filing Date October 6, 1998
Current Basis 1A
Original Filing Basis 1A
Published for Opposition May 18, 1999
Registration Number 2269241
Registration Date August 10, 1999
Owner (REGISTRANT) Grande Cheese Company CORPORATION ILLINOIS P.O. Box 67, Dairy Road Brownsville WISCONSIN 53996
Attorney of Record Marta S. Levine
Type of Mark TRADEMARK
Register PRINCIPAL
Live/Dead Indicator DEAD
Cancellation Date May 13, 2006