A “quesadilla” isn’t a “case of dillas,” but there are jokes.

“Wasn’t Homer the guy that turned down the offer of a quesadilla. As I recall he said ‘better make it one dee-a, I don’t think I could eat a whole case’” was posted on the newsgroup alt.fan.british-accent/ on August 16, 1999. “I’d get the quesadillas, but I don’t think I could eat a whole case” was posted on the newsgroup alt.religion.kibology on March 31, 2004.

This was posted on Reddit—Dadjokes on July 23, 2013:

Whenever I order quesadillas…
Me: “I’ll have the quesadillas please.”
Dad: “A whole case of dillas?! How about you just have one dilla then see how you feel.”

“Why did Sherlock Holmes visit a Mexican restaurant?"/"Because he was looking for a good case idea” is another quesadilla joke.


Wikipedia: Quesadilla
A quesadilla (/ˌkeɪsəˈdiːjə/; Spanish: [kesaˈðiʝa]) is a Mexican dish and type of taco, consisting of a tortilla that is filled primarily with cheese, and sometimes meats, spices, and other fillings, and then cooked on a griddle. Traditionally, a corn tortilla is used, but it can also be made with a flour tortilla, particularly in northern Mexico and the United States.

Google Groups: alt.fan.british-accent/
I’m Back!
Michael Spooner
Aug 16, 1999, 3:00:00 AM
(...)
Wasn’t Homer the guy that turned down the offer of a quesadilla.

As I recall he said “better make it one dee-a, I don’t think I could eat a whole case”.

Google Groups: alt.religion.kibology
Short, Shameful Confession
Tim Serpas
Mar 31, 2004, 11:06:28 AM
(...)
“I’d get the quesadillas, but I don’t think I could eat a whole case.”

Twitter
🅱🅸🅶 🅳🅰🅳🅳🆈 🅷🅰🅼🅼🅴🆁
@Bigdaddyhammer
Eating a quesadilla… Not sure if I can eat the whole case, though…
5:15 PM · Aug 9, 2009·Twitter Web Client

Twitter
its duhnelle not danyel
@duhnelle
My Grandma (to her husband):"Do you want a quesadilla?” Shannon: “maybe just a six pack, not a whole case”
6:06 PM · Feb 26, 2011·erased734497

Twitter
The Iron Greek
@thegoatwhocried
Asked my uncle to buy me a quesadilla.  His response?  “What’s a dilla, and why do you need a whole case of them?”
12:14 AM · Mar 26, 2012·Twitter for Android

Twitter
prison mike
@MikeHornick
I don’t even know what dilla is, so why would I want a whole case of it? #CaseODilla #Quesadilla
11:18 AM · Jul 26, 2012·Twitter for Android

Twitter
Local Bar Critic
@samuel_cpfresh
- I’m getting a quesadilla
- dude, you are getting a whole case of dilla?
1:20 AM · Jan 26, 2013·Twitter for iPhone

Reddit—Dadjokes
Posted by u/XanTheMan16 July 23, 2013
Whenever I order quesadillas…
Me: “I’ll have the quesadillas please.”
Dad: “A whole case of dillas?! How about you just have one dilla then see how you feel.”

Reddit—Dadjokes
Posted by u/Silent_Shadow_117 October 26, 2013
Friend’s dad just dad-joked me.
I was riding home with a friend and his dad when we passed by a Mexican restaurant. As we pass it, I mention that I really like their quesodillas, and then he chimes in with “Oh, I could never eat a whole case, I could only eat an each-o-dilla.”

Reddit—Dadjokes
Posted by u/FX114 February 28, 2014
“I’m going to have a quesadilla.”
“Really, a whole case of them?”

Twitter
Quesadillas Daily
@ilovedillas
“@allisonhaenny: you want a quesadilla ??? maybe start out with ONE dilla before you get a whole case of them!” Mo Dillas Mo problems
12:43 PM · Jan 20, 2015·Twitter for iPhone

Google Books
Dad Jokes:
The Punniest Joke Book Ever
By Editors of Portable Press
New York, NY: Simon & Schuster
2017
Pg. ?:
Kid: I want a quesadilla.
Dad: Wow, a whole case? Why don’t you start with one and go from there?

Twitter
Katie Cox WRTV
@KatieJoCox
Dad: “Whatcha having for dinner?”
Me: “Probably just a quesadilla and some chips.”
Dad: “A whole case? Beer isn’t… http://fb.me/5LAGNExBo
8:28 PM · Aug 30, 2017·Facebook

Twitter
Sabrianna Brianna
@digital_file
WAITRESS: Would you like to try a quesadilla?
ME: I can barely eat one dilla, let alone a whole case.
5:09 AM · Nov 6, 2017·TweetDeck

Reddit—Dadjokes
Posted by u/HanShotFirst17 April 6, 2018
Honey, I’m bringing you a quesadilla…
No need to Helen, I don’t need a whole case of them. One dilla is plenty.

Twitter
Russel Craig
@rgc226
@budweiserusa Server at restaurant: Would you like to start with a Quesadilla?  Dad: Do you have a 6 pack of Dilla? I don’t think I need a whole Case....
#KingOfDadJokes #BudweiserSweepstakes
1:04 PM · Jun 20, 2020·Twitter for iPhone

Reddit—Dadjokes
Posted by u/SafetyDanceInMyPants March 5, 2021
My wife offered to make me a quesadilla for dinner
I told her no. Whatever dilla is, I don’t think I could eat a whole case.