Sarcasm, if this is sarcasm, doesn't scale well across cultures, and especially not online, in addition, in text form :-)

That's if you're being sarcastic in addition to OP's original comment.

This is not sarcasm. I have a distinct idea in my head of what a cookie should generally look like, and it doesn't look like a biscuit. I can see the confusion, both have chocolate chips in and your classic digestive usually doesn't, but I'd put good money on my ability to identify one or the other