“I am not a glutton—I am an explorer of food” is a saying that has been printed on many images. The saying is often credited to American humorist Erma Bombeck (1927-1996), but Bombeck didn’t say it.
 
American professional boxer Archie Moore (1916-1998) was credited in The New Yorker on November 11, 1961:
 
“The sports columnist Jimmy Cannon once accused him of gluttony, to which he replied, with all possible solemnity, ‘No, Jimmy, I am not a glutton — I am an explorer of food.’”
 
   
Wikipedia: Archie Moore
Archie Moore (born Archibald Lee Wright; December 13, 1916 – December 9, 1998) was an American professional boxer and the longest reigning World Light Heavyweight Champion of all time (December 1952 – May 1962). He had one of the longest professional careers in the history of the sport. Nicknamed “The Mongoose”, and then “The Old Mongoose” in the latter half of his career, Moore holds the record for the most career knockouts (131) in boxing history. Moore was a highly strategical and defensive boxer, with a great chin and bludgeoning power, he ranks #4 on The Ring’s list of “100 greatest punchers of all time”. Moore is rated by prominent boxing website BoxRec as the 3rd greatest pound-for-pound boxer of all-time. Moore was also a trainer for a short time after retirement. He trained boxers such as Muhammad Ali, George Foreman and James Tillis.
     
Google Books
The New Yorker
Volume 37
11 November 1961
Pg. 64:
The sports columnist Jimmy Cannon once accused him of gluttony, to which he replied, with all possible solemnity, “No, Jimmy, I am not a glutton — I am an explorer of food.”
 
29 April 1964, San Diego (CA) Union, Jack Murphy column, pg. B-5, col. 1:
It’s appropriate that Moore, have terminated his long career as a gladiator, has entered the restaurant field. His views on eating and dieting should be chiseled in stone, like ancient tablets.
 
“Fat,” says Moore, is only a three-letter word designed to confuse people.”
 
And: “I am not a glutton—I am an explorer of food.”
 
12 August 1979, The Times Herald (Port Huron, MI), “Potpourri” by Addie Philko, pg. 1C, cols. 3-4:
Erma Bombeck reveals, “I am not a glutton. I am an explorer of food.” So are many of us, Erma.
 
Google Books
Sportswit
By Lee Green
New York, NY: Ballantine Books
1986, ©1984
Pg. 140:
ARCHIE MOORE former light-heavyweight boxing champion:
“I am not a glutton, but I am an explorer of food.”
 
Google Books
Eat These Words:
A Delicious Collection of Fat-Free Food for Thought
By Michael Cader and Debby Roth
New York, NY: HarperCollins Publishers
1991
Pg. 28:
I am not a glutton — I am an explorer of food.
ERMA BOMBECK
 
Google Books
Food and Drink:
A Book of Quotations
By Susan L. Rattiner
Mineola, NY: Dover Publications, Inc.
2002
Pg. 24:
I am not a glutton—I am an explorer of food.
ERMA BOMBECK
   
Google Books
The Little Red Book of Kitchen Wisdom
By Nicole Frail and Matthew Magda
New York, NY: Skyhorse Publishing
2014
Pg. ?:
I am not a glutton—I am an explorer of food. —ERMA BOMBECK, American humorist