https://royalsocietypublishing.org/doi/10.1098/rsif.2019.062...
And the highly technical paper in this post attests to that.
The fact that it is something that physicists are studying and it is published on Ars Technica seems to me to be enough to justify it being technical enough for Hacker News (which generally doesn't have to be technical per se, but just intellectually interesting to technically oriented people)
Also it has "Royal Society" in the paper so it has carte blanche to pick seemingly frivolous topics if they have merit. Furthermore, very good cooking is mostly scientific with some art. French Guy Cooking's Alex has more of a lab/workshop than a kitchen because he's so fanatical to improve the art and science of food.