USA

Mushroom Swiss Burger

The grown-up burger that fast food codified: why Swiss and not American, why savory and not acidic, and how Hardee's and Whataburger turned a diner upgrade into a name people petition to bring back.

Montana Bison Burger

Ground bison runs 2-6 percent fat to beef's 15-25, so it lives or dies on a rare-to-medium pull. The animal fell from millions to about 1,000 by 1889 before ranchers rebuilt it from Montana stock.