The more you know...

mrsconn23

http://www.buzzfeed.com/rachelzarrell/black-bun-comes-out-green#.hjgrMmoA3

I mean, it already looks completely unappetizing...so this is not a vote in its favor. 

MNNEBride

Yup, just like black jelly beans

MesmrEwe

LOL - in other words, it's a green tint to make the black... 

Heffalump

Well, I didn't exactly need another reason not to eat a Whopper with a black bun, but it's definitely not swaying me.
S/O fast food, now that McD's finally has all-day breakfast, I'm in the minority of states where they're only offering biscuits, not muffins.