In the early '70s a cook named Bob Detweiler got tired of making "just burgers," so he made up this recipe (his wife, Julie, the manager, suggested the cheese topping). It became an instant hit, and they've had it on the menu ever since.
Make the Det Mix: Combine all the ingredients in a bowl.
Make the hamburgers: Heat the butter and oil in a large cast iron skillet over high heat. Add the hamburgers and cook halfway through and turn over. Cover each with about 1/4 cup of the Det Mix and top with the onion slices. Pour in the 1/4 cup beer and cover with a lid. Steam a couple of minutes until the onion is translucent. Re-steam with beer a couple of times. Top each hamburger with a slice of cheese and cover until melted. Transfer the hamburger to the buns and serve.
James Beard's Favorite Hamburger
Spread the meat out on a board and grate 2 to 3 tablespoons of onion into it¿use a fairly fine grater so you get just the juice and very finely grated raw onion. Now mix in about a tablespoon of heavy cream and some freshly ground black pepper. Form into patties¿a 6 to 8-ounce patty for an average serving.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe adapted from the Del Rio Bar, Ann Arbor, Michigan