While I was busy busy moving, Japan found a new and unique way to use the black burger bun. I bet it taste like chicken! :
You can find the whole story here: http://money.cnn.com/2015/03/06/news/frog-burger-japan/index.html?sr=fbmoney030615frogburger1200story.
Culinary Epiphany 
Oh, wow! Interesting! I wonder if they put squid ink to color the dough. 😀
I think they use “takesumi” which is bambo charcoal. Some use squid ink to make some kind of sauce that is used to spread on the bun for hamburgers.
Wow! Talk about food adventure. 😀