A restaurant joke is:
 
Diner: Waiter, I can’t seem to find any oysters in this oyster soup.
Waiter: Would you expect to find angels in angel cake?
 
The joke involved “chicken pie” instead of “oyster soup” in 1941. An “oyster stew” version was printed in 1971 newspapers.
     
     
29 October 1941, The Perry County Democrat (New Bloomfield, PA), “Jokes and Stories, pg. 1, col. 8:
Customer—“Waiter, what did I order?”
Waiter—“Chicken pie, sir!”
Customer—“There’s no chicken in it”
Waiter—“That’s right, there’s no chicken in it, sir.”
Customer—“Then why call it chicken pie?”
Waiter—“That’s all right. There’s no angel in angel cake, is there?”
   
1 July 1971, Big Basin Herald (Muldrow, OK), “Grins and Chuckles,” pg. 20, col. 1:
CUSTOMER: “Waiter, I can’t find any oysters in this oyster stew.”
Waiter: Well, you would not expect to find any angels in angel-food cake, would you?
 
12 December 1971, The Courier-Journal (Louisville, KY), “funnybone,” Magazine, pg. 52, col. 3:
Customer: “Waiter, I can’t find any oysters in this oyster stew.”
Waiter: “Well, you would not expect to find any angels in angel-food cake, would you?” Mrs. Gladys Boblitt, Louisville
     
Google Books
April 1972, Boys’ Life, “Think and Grin,” pg. 84, col. 4:
Customer: Waiter, I can’t seem to find any oysters in this oyster stew.
Waiter (huffy): Well, would you expect to find angels in angel-food cake? — Duane Forcade, Freeburg, Ill.
   
Old Fulton Post Cards
17 August 1972, Dade County Sentinel (Trenton, GA), pg. 2, col. 4:
The Very Idea!....This didn’t happen in Dade, but it is said that a certain customer told the waiter in a certain restaurant, “I can’t find any oysters in this stew.” “Well, you wouldn’t expect to find any angels in angel food cake, would you,” replied the waiter.
 
Google Books
The Gigantic Joke Book
By Joseph Rosenbloom
Illustrations by Joyce Behr
New York, NY: Sterling Publishing Company, Inc.
1978
Pg. 89:
Customer: Waiter, I can’t seem to find any oysters in this oyster soup.
Waiter: Would you expect to find angels in angel cake?
 
28 April 1985, Newsday (Long Island, NY), “Smiles,” Kidsday, pg. 47, col. 3:
Customer: I can’t seem to find any oysters in this oyster soup.
Waiter: Would you expect to find angels in angel cake?
—Karen Reed, Huntington
     
Google Books
World’s Best Professional Jokes
By Clifford Sawhney
New Delhi, India: Pustak Mahal
2004
Pg. ?:
Waiter, I can’t seem to find any oysters in this oyster soup.
Would you expect to find angels in angel cake?
 
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?:
“Waiter, I can’t seem to find any oysters in this oyster soup.Would you expect to find angels in angel cake?”
 
Twitter
lorraine Jo King
#wednesdaywit
Waiter, I can’t seem to find any oysters in this oyster soup.
Would you expect to find angels in angel cake?
5:09 PM - 19 Jun 2018