A really good burger. That's what it means.
Fascinating last few pages, but it didn't answer the question burning in my brain. When we in England use the term "cookie" we're referring to a very particular type of biscuit (which doesn't comply with the cake/biscuit rule DA quoted as they're often soft by design), would an American call a digestive, or a custard cream or a bourbon a cookie? Or do they have no word for them?
Apple walnut raisin COOKIES don't grow on trees you know: