I always thought it was named after the Three Kingdoms era military leader Cao Cao. I blame it on Wade-Giles making no goddamn sense to me. Tso vs Ts'ao.
Caesar salad was a big surprise to me when I learned about it, both the location and date. Tijuana MX 1924. Of course I learned this 25-30 years ago. It was more recent then.
Are we sure about Apple Crumble? I'm pretty sure it's a typical treat of France and mostly German for quite some time. Won't surprise me if it slightly evolved in GB recently but to be invented...
I found a reference to crumble pies from saxony from 1584. Although a bit different, using crumbles over fruit pies isnt that much different and i'd bet my left nipple, that it has been baked in the centuries before.
The date of invention in this case looks like it is being determined through dated recipes of which earlier ones may have been lost.
Blended iced coffee is definitely older than the 1980s, though it wasn't widely popular I think
Either that or stories of grandma making her coffee, putting ice in it, and running it through the food processor to make "a coffee treat every morning" are actually evidence that Grandma was 30 years ahead of the curve
ETA: mentioned it to my wife and she told me that her uncle apparently ran a small coffee shop in TX in the late 70s that did that exact concept, and he claimed that the idea was widespread before he got the idea to put it on his menu for money. So it's definitely older than the 1980s
While I didn't know specific dates, I'm not surprised by the ones I know by name here, tbh. Flavorful food was a luxury for most until relatively recently, and along with the large cultural changes going on last century, these all make sense.