An “HTTP cookie” is not something that’s eaten, but there have been several jokes. English comedian Lee Mack told this joke in 2010:
 
“The bloke fixing my PC said, ‘Have you tried disabling cookies?’ I said, ‘I bit the legs off a gingerbread man.’”
           
“Disabled cookies? In my day, we called them broken biscuits” is a related joke.
   
   
Wikipedia: Lee Mack
Lee Gordon McKillop (born 4 August 1968), known as Lee Mack, is an English comedian and actor best known for writing and starring in the sitcom Not Going Out. He is also known for being a team captain on the BBC One comedy panel show Would I Lie to You?, hosting the Sky1 panel show Duck Quacks Don’t Echo and for presenting the show They Think It’s All Over.
 
Wikipedia: HTTP cookie 
An HTTP cookie (also called web cookie, Internet cookie, browser cookie, or simply cookie) is a small piece of data sent from a website and stored on the user’s computer by the user’s web browser while the user is browsing. Cookies were designed to be a reliable mechanism for websites to remember stateful information (such as items added in the shopping cart in an online store) or to record the user’s browsing activity (including clicking particular buttons, logging in, or recording which pages were visited in the past). They can also be used to remember arbitrary pieces of information that the user previously entered into form fields such as names, addresses, passwords, and credit card numbers.
     
The Guardian (London, UK)
7 January 2010, The Guardian (London, UK), “Review: Comedy: Lee Mack, Gulbenkian, Canterbury 4/5” by Brian Logan, pg. 36:
Tribute shows to the Goons, the Carry Ons and Tommy Cooper may be all the rage - but the past isn’t the only place where old-school comedy flourishes. Lee Mack has just had his sitcom Not Going Out re-commissioned, and recently extended this 96-date UK tour. But, give or take the rude words, his jokes are as much 1970s as 2010. And none the worse for it.
 
“Have you tried disabling cookies?” he asks. “Well, I once bit the legs off a gingerbread man.”
 
Twitter
Ian Chode
@ianchode
“Have you tried disabling cookies?” he asks. “Well, I once bit the legs off a gingerbread man.” - Lee Mack.
7:16 AM - 8 Jan 2010
   
Twitter
SimonB
@besthebeast
#mademelaugh ‘Ever tried disabling cookies?’ ‘No’ I reply, ‘but I did once bite a gingerbread man’s legs off.’ Lee Mack - funny man!
9:24 AM - 8 Jan 2010
   
Twitter
snoxishere
@snoxishere
Lee Mack genius gag: “Have you tried disabling cookies?”  “Well, I once bit the legs off a gingerbread man.”
1:56 PM - 8 Jan 2010
     
Twitter
David Wall
@dwonderwall
“Well I once bit the legs off a gingerbread man” Lee Mack’s joke about disabling cookies - Live at The Anvil, Basingstoke
5:43 PM - 20 Feb 2010
     
10 November 2010, The Sun (London, UK), “Best Gags from Comics’ Festive DVDs” by Dave Masters, pg. 6:
LEE MACK Going Out
The bloke fixing my PC said, “Have you tried disabling cookies?” I said, “I bit the legs off a gingerbread man.”
   
Reddit—Jokes
My internet wasn’t working yesterday…
submitted July 26, 2011 by VerGuy
My internet wasn’t working yesterday, so i phoned up my service provider and asked them what i could do to to make it work.
The guy on the phone said “Have you tried disabling cookies”
I replied “I once bit the legs off a gingerbread man”
     
Twitter
Shit Jokes
@ShitJokes
I was having trouble with my computer at work so I called IT Support…
He said, “Have you tried disabling cookies?”
I said, “Well, I once bit the legs off a gingerbread man?”
2:14 PM - 20 Apr 2018
   
Twitter
Jokes UK 🔞
@jokesuk
I was having trouble with my laptop at work so I called IT Support.
He asked, “Have you tried disabling cookies?”
I said, “Well, I once bit the legs off a gingerbread man!”
4:13 PM - 20 Apr 2018