Poached burger is an American burger variety originating from Prairie du Chien, Wisconsin, and it’s made at Pete’s Hamburgers, the only place to get this burger. The meat is poached in shallow, hot water because the owner, Pete Gokey once started pouring water on the burgers to keep them moist, as the patties that sat too long would dry out.
The water pan in which the meat cooks is filled with sliced onions that flavor the liquid and the patties. Once done, the meat is placed into a bakery roll with a scoop of the onions, and the burgers are usually finished with a squirt of horseradish mustard.