TLDR: lots of salt and artificial flavourings. But a lot of interesting chemistry goes into it too. There are annealing steps, and many other processes I don’t understand.
TLDR: lots of salt and artificial flavourings. But a lot of interesting chemistry goes into it too. There are annealing steps, and many other processes I don’t understand.
Probably the salt. You could test if crisps or popcorn or such have the same effect.
Or try drinking lots of water with it.