Max Miller approves: a 3,770yo Babylonian clay tablet written in Akkadian, containing the oldest known cooking recipes. The tablet includes 25 recipes for meat and veggie stews. (recipes inside!)
Bronze Age or earlier (Before 800 BCE)
(media.piefed.social)
Three soaks and cooking in milk haven't brought good results. Not acidic, but adstringent. Acorn coffee isn't bad. It was too tempting to experiment with them as they sit right on my driveway and the equines would get too fat if they ate them. I'm not feral enough for them yet. Leather unfortunately needs a lot of moving about besides the soaking in tannines, as far as I know.