Are they rare in the UK? Common enough in my city for the last couple of decades. I think I first saw them on Friends (USA tv show), or a similar show.
At our regular Chinese takeaway the kids only get them if they come in with us; other places just include a handful.
Rare enough in my experience, perhaps I shouldn't generalise!
But I've never had them from a takeaway, and only once or twice in a restaurant. My experience is almost entirely from London and the South-East though.
At our regular Chinese takeaway the kids only get them if they come in with us; other places just include a handful.
To me the biscuit is really vile.