flummery is both a fluffy 17th-19th century dessert pudding, and a load of nonsense.
‘It’s not the age of reason … it’s the era of flummery, and the day of the devious approach’ –Trouble with Lichen (1960)
some incredible specimens here
& a little on isinglas (swim bladders of sturgeon) which were a common ingredient in flummery
a pretty basic recipe here, using berries https://permaculture.com.au/davidson-plum-rainforest-flavours-in-the-kitchen/