Someone I know on Discord who never heard of Sailor Moon, just did a Google Images search on "chibiusa" today and found this "chibiusa burger" picture:
Probably just food coloring. I've seen burger buns with different colors here.
Also there's a burger joint here that puts strawberry jam on the burger bun with bacon. A little bit too sweet for my taste. Needs a little bit more tweaking but I think it would work if they marinate the bacon in strawberry jam instead just so it won't overpower the burger's savory beefy flavor.
I knew that, of course - I was just kidding & all lol (they still look like that to me, tho, even tho I know it's unlikely).
Also there's a burger joint here that puts strawberry jam on the burger bun with bacon. A little bit too sweet for my taste. Needs a little bit more tweaking but I think it would work if they marinate the bacon in strawberry jam instead just so it won't overpower the burger's savory beefy flavor.
At least the black color doesn't contradict w/ the salty taste - the pink color only makes one associate it w/ something sweet, which the burger isn't supposed to be, nor should it be.