General Mills introduced the product “Country Corn Flakes” in 1962. A list of “Southern Sayings” became popular on the Internet in 2000 and #9 was:
 
“He’s as country as cornflakes.”
 
“Country as cornflakes” (or “country as corn flakes”) means something that is genuinely country. “Country as cornbread” is a similar saying.
 
   
Mr. Breakfast
COUNTRY CORN FLAKES
Country Corn Flakes From: General Mills
Introduced in 1962
 
YouTube
Country Corn Flakes Commercial (1963)
I Want Moore Retro
Uploaded on Sep 12, 2008
This 1963 commercial for General Mills’ New Country Corn Flakes is a parody of Grant Wood’s famous 1930 “American Gothic” painting. THEY’RE MADE FROM CORN! *crack*
 
Google Groups: misc.transport.trucking
Accents
kimmimo
1/25/00
SOUTHERN SAYINGS ...
1.    “Well, butter my butt and call me a biscuit.”
2.    “It’s been hotter’n a goat’s butt in a pepper patch.”
3.    “He fell out of the ugly tree and hit every branch on the way down.”
4.    “Have a cup of coffee-it’s already been ‘saucered and blowed’.”
5.    “She’s so stuck up, she’d drown in a rainstorm.”
6.    “It’s so dry, the trees are bribing the dogs.”
7.    “My cow died last night, so I don’t need your bull.”
8.    “Don’t pee down my back and tell me it’s raining.”
9.    “He’s as country as cornflakes.”
 
Google Groups: alt.fan.firesign-theatre
PLANET PROCTOR 2000, VOLUME 15
Richard Arnold
6/28/00
(...)
THAT’S WHAT I LIKE ABOUT THE SOUTH
 
“Well, butter my butt and call me a biscuit; it’s been hotter’n a goat’s butt in a pepper patch. It’s so dry, the trees are bribing the dogs. Have a cup of coffee, it’s already been ‘saucered and blowed. I bin busier than a cat covered in crap on a marble floor; if things get any better, I may have to hire someone to help me enjoy it. This is gooder’n grits.
 
“Jes don’t pee down my back and tell me it’s rainin’; my cow died last night so I don’t need your bull. Lokee thar. He’s as country as corn flakes but he fell out of the ugly tree and hit every branch on the way down. ‘N she’s so stuck up, she’d drown in a rainstorm. You writin’ this all down, Slick?”
 
Google Books
Off the Internet for Everyone:
An Eclectic Mix of Stories, Jokes and Inspirational Pices Off the Internet to You!
By Tammy Wright
Richmond, VA: Wright Opportunities, Incorporated
2002
Pg. 92:
9. “He’s as country as Cornflakes.”
 
Google Books
Whiskey River (Take My Mind):
The True Story of Texas Honky-Tonk
By Johnny Bush with Rick Mitchell
Austin, TX: University of Texas Press
2007
Pg. 66:
Johnny Cash was as country as cornflakes, you know?
 
Twitter
SagArt LLC
‏@sagart52
Funny Quote: He’s as country as cornflakes.
10:07 PM - 19 May 2009
 
Twitter
Southern Hospitality
‏@BBQNYC
Today’s Twitter Password is ““He’s as country as corn flakes.” mention it to your server and receive 10 percent of your entire dinner bill
4:53 PM - 30 Mar 2010
 
OCLC WorldCat record
Lizard tales : the wit and wisdom of ron shirley
Author: Ron Shirley
Publisher: New York : Three Rivers Press, 2013.
Edition/Format:   eBook : Document : English : Unabridged
Database: WorldCat
Summary:
The star of TruTV’s hit show, Lizard Lick Towing, shares stories of life as a small-town repo man, as well as the “Ron-isms” and “Ron-osophy” he is known for. Crazier than a sack of rabid weasels’ Country as cornflakes’ Gooder than grits’ You bet he is! Week after week, millions of viewers tune in to Lizard Lick Towing to watch Ron Shirley outsmart the fist-swinging, gun-toting folks whose vehicles he’s been hired to repossess. Staring danger in the face, Ron disarms them not with his size or his strength but with his wit’and especially with his trademark funny sayings that have come to be known as “Ronisms.”
 
(Trademark)
Word Mark COUNTRY CORN FLAKES
Goods and Services IC 030. US 046. G & S: BREAKFAST CEREAL. FIRST USE: 19860530. FIRST USE IN COMMERCE: 19860530
Mark Drawing Code (3) DESIGN PLUS WORDS, LETTERS, AND/OR NUMBERS
Design Search Code 26.15.27 - Keystones
Serial Number 73602308
Filing Date June 4, 1986
Current Basis 1A
Original Filing Basis 1A
Published for Opposition November 18, 1986
Change In Registration CHANGE IN REGISTRATION HAS OCCURRED
Registration Number 1428646
Registration Date February 10, 1987
Owner (REGISTRANT) GENERAL MILLS, INC. CORPORATION DELAWARE NUMBER ONE GENERAL MILLS BOULEVARD MINNEAPOLIS MINNESOTA 55426
Assignment Recorded ASSIGNMENT RECORDED
Attorney of Record JOSHUA J BURKE
Prior Registrations 0803501;1346587;AND OTHERS
Disclaimer NO CLAIM IS MADE TO THE EXCLUSIVE RIGHT TO USE “CORN FLAKES” APART FROM THE MARK AS SHOWN
Type of Mark TRADEMARK
Register PRINCIPAL
Affidavit Text SECT 15. SECT 8 (6-YR). SECTION 8(10-YR) 20070323.
Renewal 1ST RENEWAL 20070323
Live/Dead Indicator LIVE