“A waffle is a pancake with a non-skid tread”

“Webster notwithstanding, in our opinion a restaurant waffle is pancake with a non-skid tread” was printed in a June 1923 newspaper. “A waffle is a pancake with a non-skid tread” is a jocular food definition that has been frequently reprinted.
 
   
15 June 1923, Honolulu (HI) Star-Bulletin, “Down to Cases” with Case, pg. 6, col. 3:
Webster notwithstanding,
In our opinion a
Restaurant waffle is
Pancake with a
Non-skid tread.
 
Google Books
September 1930, The Rotarian, pg. 35, col. 1:
A small boy recently defined a waffle as a pancake with a non-skid tread.
 
Google Books
November 1960, Boys’ Life, “Think and Grin,” pg. 82, col. 2:
Daffynishion: Waffle — A pancake with a non-skid tread, — Wendell Hall, Ft. Myers, Fla.
 
Google Books
Teachers:
Jokes, Quotes, and Anecdotes
By Todd Harris Goldman
Kansas City, MO: Andrews McMeel Publishing
2001
Pg. 244:
TEACHER: “Johnny, can you tell me what a waffle is?”
JOHNNY: “Yes’m, it’s a pancake with a non- skid tread.” — Lewis and Faye Copeland
 
Twitter
Hugh Mann‏
@hughmann2
“Johnny, can you tell me what a waffle is?  Yes, it’s a pancake with a non-skid tread.”
9:22 PM - 3 Aug 2010
 
Twitter
Tony D.‏
@VMMan
Replying to @Veronica
@Veronica Just remember what they said in the 60’s “A waffle is a pancake with a non-skid tread”
11:45 AM - 13 Jul 2012
 
Twitter
Meg 🌻‏
@MeganMarieODea
“Can you tell me what a waffle is?”
“It’s a pancake with a non-skid tread.”
12:52 PM - 9 Feb 2017