Context (New York Times),

MINTS An organic fudge brownie awaits you in the room, along with a personalized welcome letter...

First, I'm not sure if I'm on the right track or not (I'm wondering if mints here is a shortening for mint aspects [nice/good aspects].?), but these are what I found on the Internet,

Wiktionary : 4.(slang) Very good.

Urban Dictionary: 1. Nice. 2. Cool

If I'm correct, I would like to know how common this word (mint adj.) is used in AE?

By the way, is this word used in BE as well? Because I also read this,

Urban Dictionary: 2.Expression used in The North Of England meaning good