McDonald's France is currently running a limited-time American-themed promotion called "Breads & America" featuring burgers with various "American" buns.
The line up features three burgers: the Double Cornbread BBQ, the Grand Bagel Cheese, and the Shiny Double Bacon.
The Double Cornbread BBQ comes on cornbread and features two beef patties, a slice of cheddar cheese, fried onions, lettuce, and barbecue sauce. The "cornbread" doesn't quite look like what would pass for cornbread here in the US and apparently is a bun topped with bits of corn chips.
Finally, the Shiny Double Bacon seems to be so named for the shiny bun and comes with two beef patties, a slice of cheddar cheese, bacon, lettuce, and a creamy sauce.