“What did the Pilgrims use to bake cakes?”/“May-flour.”

A Thanksgiving food riddle is:
 
Q: What did the Pilgrims use to bake cakes?
A: May-flour.
 
“What did the Pilgrims use to bake cakes? May-flour!” was posted on Twitter on November 25, 2009.
 
   
Wikipedia: Mayflower
The Mayflower was the ship that transported the first English Separatists, known today as the Pilgrims, from Plymouth to the New World in 1620. There were 102 passengers, and the crew is estimated to have been about 30, but the exact number is unknown. This voyage has become an iconic story in some of the earliest annals of American history, with its story of death and of survival in the harsh New England winter environment. The culmination of the voyage in the signing of the Mayflower Compact was an event which established a rudimentary form of democracy, with each member contributing to the welfare of the community.
 
Twitter
❤️ FizzyDuck ❤️
‏@FizzyDuck
What did the Pilgrims use to bake cakes? May-flour! #HappyThanksgiving #Joke
2:10 PM - 25 Nov 2009
 
Twitter
Bill Helton
‏@7colonel7
Corny joke…What did the Pilgrims use to bake cakes?  Mayflour!
3:58 PM - 30 Nov 2010
 
Facebook
Wishing you a safe & warm Thanksgiving!
November 24, 2010 at 12:00pm
(...)
What did the Pilgrims use to bake Thanksgiving Cakes?
May-Flour
 
Twitter
Zach Forsberg-Lary
‏@ZForsbergLary
Q:  What’s the main ingredient in Pilgrims’ bread?
A:  May-flour.
#lamethanksgivingjoke
8:53 PM - 17 Nov 2012
 
Google Books
Corny Thanksgiving Jokes to Tickle Your Funny Bone
By Linda Bozzo
Berkeley Heights, NJ: Enslow Publishers, Inc.
2013
Pg. 6:
What did the Pilgrims use to bake cakes?
May-flour.
   
Mom Junction
90 Funny Thanksgiving Day Jokes For Kids
ARSHI ON NOVEMBER 3, 2015
(...)
Joke 62:
Q. What did pilgrims use to bake cookies?
A. May-Flour!
 
Odyssey
11 Turkey Day Jokes To Use At Dinner
Nov 24, 2015 At Fairleigh Dickinson University
(...)
What did the pilgrims use to bake cakes?
May-flour.