I would have said chocolate HobNobs (everything else mentioned thus far that isn’t a chocolate HobNob is simply inferior) BUT!
Someone recently gave me a pack of ‘Grandma Wild’s oatie cookies‘ which obviously hark from somewhere good in the north of England.
Holy mother of God, not only are these things very tasty indeed, they’re also ENORMOUS! Practically visible from space!
Normally when I get in the house after a Monday night chaingang I can put away a big glass of milk and five or six HobNobs before going for a shower, but the other week I had one of these things and then thought a second might be a step too far.
I don’t know where you get them from, and I suspect they cost about a million pounds, but they’re proper sensational.