“Country as cornbread” (or “country as corn bread") means something that is genuinely country. The expression “country as cornbread” has been cited in print since at least 1976.
“Country as cornflakes” is a similar saying.
16 August 1976, Dallas (TX) Morning News, “Oxford a redneck andproud of it,” pg. 6C, col. 1:
NASHVILLE, Tenn. (AP)—Vernon Oxford is a redneck and proud of it.
he is an easygoing, slender 35-year-old native of the Ozark Mountains who’s as country as cornbread and has a top single on the charts, “Redneck: The Redneck National Anthem.”
11 March 1979, Washington (DC) Star, “Boston Is Not Larry Bird’s Kind of Town” by Steve Hershey, pg. B-3, col. 5:
“No way the Bird will fly East,” one reporter said. “He’s as country as cornbread.”
The Laughable Letters of Robert L. Steed
By Robert L. Steed
Marietta, GA: Longstreet Press, Inc.
They are as country as cornbread and as sorry as gully dirt.
All That Remains
By Patricia Cornwell
New York, NY: Scribner
She was at least sixty and looked as country as corn bread.
The All-American Truck Stop Cookbook
By Jim Clark, Ken Beck and Les Kerr
Nashville, TN: Rutledge Hill Press
“He was a great singer and I was as country as corn bread.”
It’s Good to Be the King...Sometimes
By Jerry Lawler
New York, NY: Pocket Books
I got to come back, and believe me, from that point on, my show was as country as cornbread!
Tell Me How the Sun Rose
By Kihindei Adai
Lulu Publishing (Lulu.com)
He was Cajun, from East Texas and as country as corn bread.
Day 45 Video UP: http://www.bunnyberry.blogspot.com See me with my new country as cornbread front teeth! Guaranteed to amuse.
2:28 PM - 28 May 2008
This bus driver is as country as cornbread...a true Nashvillian.
7:58 AM - 12 Jun 2009
The Wit and Wisdom of Ron Shirley
By Ron Shirley
New York, NY: Three Rivers Press
1. Country as cornflakes and gooder than grits.
2. Country as a baked-bean sandwich.
3. Country as cornbread.
Word Mark COUNTRY CORNBREAD
Goods and Services (CANCELLED) IC 030. G & S: NO GOODS/SERVICES STATEMENT ON TRAM
Mark Drawing Code (1) TYPED DRAWING
Serial Number 81006960
Filing Date 0000
Current Basis UNKNOWN
Original Filing Basis UNKNOWN
Registration Number 1006960
Registration Date March 18, 1975
Owner (REGISTRANT) Pillsbury Company, The UNKNOWN Minneapolis MINNESOTA
Live/Dead Indicator DEAD
Cancellation Date August 11, 1981