“What kind of cake do you get at a cafeteria?”/“A stomach cake.”

“the “stomach cake” (for “stomach ache”) pun is an old one. “TO MAKE A STOMACH CAKE.—Use plenty of unripe fruit” was cited in the Melbourne (Australia) Punch in 1867. This joke was told in 1888:
 
“I had five kinds of cake. First I had some sponge-cake and chocolate-cake, and then I had jellycake and cream-cake, and then I had the stomach-cake.”
 
The “stomach cake” was used in a school cafeteria joke in 1997:
 
Q:  What kind of cake do you find in a school cafeteria?
A:  A stomach cake.
 
 
Google Books
29 August 1867, Melbourne (Australia) Punch, “Recipes,” pg. 72:
TO MAKE A STOMACH CAKE.—Use plenty of unripe fruit.
   
Google Books
23 December 1885, Judy, or the London Serio-Comic Journal, “Crackers for Christmas Time,” pg. 305:
The only cake children at Christmas-time do not like is a stomach-cake.
   
Google Books
October 1888, The Dental Register, pg. 533:
MAMMA: “Did you have a nice time at the party, Harry?”
Harry: “Oh, yes, splendid! I had five kinds of cake. First I had some sponge-cake and chocolate-cake, and then I had jellycake and cream-cake, and then I had the stomach-cake.”
   
Google Books
Encyclopedia of Comedy
By James Melville Janson
Philadelphia, PA: David McKay, Publisher
1899
Pg. 522:
INT: What kind of cake is a dyspeptic man?
TAMBO: Dyspeptic man? Why, stomach ache (stomach cake).
 
Google Groups: alt.humor.puns
Cake
JIndov8640
4/2/97
Q:  What kind of cake do you find in a school Cafateria?
A:  A stomach Cake.
 
Google Books
Lunchbox Laughs:
A Book of Food Jokes
By Mark Ziegler
Illustrated by Anne Haberstroh
Minneapolis, MN: Picture Window Books
2005
Pg. 18:
What is the worst kind of cake to have?
A stomach -cake.
 
Google Books
Let’s Eat in the Funny Zone
By Gary Chmielewski
Chicago, IL: Norwood House Press
2008
Pg. 21:
What dessert do you get when eating in the school cafeteria?
Stomach-cake.
 
Google Groups: alt.appalachian
Nah, nah nah Boener
Guv Bob
1/25/13
(...)
LARRY: What kind of cake do you get at a cafeteria?
JOEVAN: A stomach-cake!
 
Twitter
Marianna Annadanna
‏@SnappySurprise
“If I eat too much cake I get a stomach cake.” #FraggleQuotes
12:31 PM - 27 May 2016