“Apple: Nutritious lunchtime dessert which children will trade for cupcakes”

A jocular definition of an apple is:
 
“APPLE: Nutritious lunchtime dessert which children will trade for cupcakes.”

The jocular definition was posted to the newsgroup bit.listserv.down-syn in 1998 and possibly comes from the book The Mom Dictionary (1993) by Valerie McKeown and Chris Brethwaite.
 
 
OCLC WorldCat record
The mom dictionary
Author: Valerie McKeown; Chris Brethwaite
Publisher: Kansas City : Andrews and McMeel, ©1993.
Edition/Format: Print book : English
 
Google Groups: bit.listserv.down-syn
HUMOR: MOM’S DICTIONARY
Ralph & Judi Lowenthal
1/7/98
(...)
>APPLE: Nutricious lunchtime dessert which children will trade for cupcakes.
 
Google Groups: alt.tasteless.jokes
Dictionary for Moms
THE BIG PIG
2/3/98
(...)   
APPLE:  Nutritious lunchtime dessert which children will trade for cupcakes.
 
Google Books
The World’s Best Bathroom Book:
An Inspirational Collection of Wit, Wisdom, Humor, and Fascinating Facts
By Honor Books
Colorado Springs, CO: Honor Books
2005
Pg. 118:
A-Z Dictionary for Moms
(...)
APPLE: Nutritious lunchtime dessert, which children will trade for cupcakes
   
Twitter
🇮🇳 Ğяєєи мσик‏
@iGreenMonk
APPLE: Nutritious lunchtime dessert which children will trade for cupcakes.
#MOMDICTIONARY
9:30 PM - 22 Jan 2014
 
Twitter
david cordick‏
@decordick
Apple: Nutritious lunchtime dessert which children will trade for cupcakes.
3:07 PM - 17 Dec 2014