Or "special" - "You didn't miss Karen's special cookies, did ya?"

That would usually be coupled with a very veiled reference to how she put in the minimum possible effort while indirectly insulting her entire bloodline: "Oh, don't you just feel for Karen? I don't know how she gets anything done with those kids of hers."

Alternatively, if the speaker wants to embarrass her in front of someone with a higher social standing; "Karen, these cookies are just the best thing ever! What do you put in these to make them so good?"