“What is Uncle Sam’s favorite snack?”/“Fire crackers.”

A popular July 4th (Independence Day) riddle is:
 
Q: What is Uncle Sam’s favorite snack?
A: Fire crackers.
 
July 4th firecrackers are not edible crackers, of course. The riddle has been cited in print since at least 2008.
   
   
Newspapers.com
4 July 2008, Lincoln (NE) Journal Star, “Kids Corner,” pg. 3D, col. 1:
Q: What is Uncle Sam’s favorite snack?
A: Fire crackers!
 
Newspapers.com
16 August 2008, The Post-Crescent (Appleton, WI), “Summer Laughs,” pg. A-6, col. 4:
What’s Uncle Sam’s favorite snack?
A: Firecrackers!  Michael, 6th grade
   
Twitter
KerryAnnCrotzer
@kerryber
“What’s Uncle Sam’s favorite snack?”
“Fire Crackers!!”
5:28 PM · Jul 4, 2010·Twitter Web Client
   
Twitter
Matt
@vipregan
What is Uncle Sam’s favorite snack? ...Fire crackers!
2:56 PM · Jul 4, 2012·Twitter Web Client
   
Twitter
Teachers @ MyTownTutors
@mytowntutors
What is Uncle Sam’s favorite snack?… Fire crackers http://bit.ly/11ZNe3t #sschat #edchat
1:05 PM · Jul 2, 2013·Twuffer
   
Twitter
Josh Bailey
@jbbailey919
What is Uncle Sam’s favorite snack?
Fire-crackers.
#IndependenceDay #fourthofjuly #murica
1:48 PM · Jul 4, 2016·TweetDeck
   
Twitter
Michelle O’Rear
@vibrantmjh
What is Uncle Sam’s favorite snack?
Fire-crackers.
Happy Uncle Sam Day!
11:15 AM · Sep 13, 2016·Capzool
   
Twitter
Donny Thompson
@DonnyThompsonBB
What are Uncle Sam’s favorite snack?
Fire-crackers! 💥
#HappyFourthOfJuly 🇺🇸
2:32 PM · Jul 4, 2019 from North Carolina, USA·Twitter for iPhone
   
YourTango
100 Cute, Funny & Patriotic 4th Of July Captions To Celebrate On Instagram
By Alice Kelly — Updated on Jul 01, 2022
(...)
44. What is Uncle Sam’s favorite snack? Fire-crackers.
 
Reddit—Cleanjokes
Posted by u/lodiman77 July 3, 2022
What is Uncle Sam’s favorite snack?
Fire Crackers!