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Double Cheeseburgers with Caramelized Onions

FOOD & WINE Wine Club Double Cheeseburgers with Caramelized Onions FOOD & WINE Wine Club Double Cheeseburgers with Caramelized Onions
In these plump, juicy burgers, caramelized onions and Gruyére add a sweet, rich edge to succulent ground beef.
Servings: 6
Total Time: 45 minutes
Ingredients
2 tablespoons unsalted butter
1 sweet onion, thinly sliced
Salt and freshly ground black pepper
1/2 cup mayonnaise
1 tablespoon fresh lemon juice
1 small garlic clove, mashed
1 1/2 teaspoons smoked paprika
1/2 teaspoon cayenne pepper
1/4 cup extra-virgin olive oil
1 tablespoon chopped cornichons
1 tablespoon chopped flat-leaf parsley
6 ounces shredded Gruyére cheese
6 ounces shredded sharp cheddar cheese
3 pounds ground beef chuck, shaped into twelve 1/2-inch-thick patties
Toasted brioche buns, for serving
Bread-and-butter pickles and shredded lettuce, for serving
Directions
1. In a skillet, melt the butter. Add the onion, cover and cook over moderately low heat, stirring, until softened, 15 minutes. Uncover and cook over moderate heat, stirring, until the onion is caramelized, 20 minutes; add water if necessary to keep the onion from burning. Season with salt and pepper.

2. In a small bowl, whisk the mayonnaise with the lemon juice, garlic, paprika and cayenne. In a steady stream, whisk in the olive oil and season with salt and pepper. Fold in the cornichons and parsley.

3. Heat a griddle. In a bowl, mix the Gruyére and cheddar. Season the beef patties with salt and pepper and cook over high heat for 2 minutes. Flip the burgers and top with the mixed cheeses. Carefully cover the burgers with a large inverted roasting pan and cook for 2 minutes longer, until medium-rare and the cheese is melted.

4. Spread the paprika mayonnaise on the bottom halves of the buns and stack 2 patties on each. Top with the onions, pickles and lettuce and serve. —Ron Boyd