Ingredients
1lbground beef
1egg,large
1yellow onion,medium
¼tspgarlic powder
1tspkosher salt
1tspfreshly ground black pepper
2tbspunsalted butter
12slicewhite sandwich bread
12sliceamerican cheese
Preparation
In a medium bowl, combine the beef, egg, grated onion, garlic powder, salt, and pepper. Mix until combined. Form into thin patties.
Spread the butter on one side of each slice of bread.
Heat a large heavy skillet over medium-high heat. Cook the burgers for about 3 minutes on each side. Drain on paper towels. Drain grease from skillet.
In the same skillet, place 6 slices of bread, butter side down. Top each with a slice of cheese, if desired, some onion slices, and a burger.
Top with remaining slices cheese, if using, and bread, butter side up. Cook each sandwich for about 2 minutes per side, until golden brown.
Serve with mustard, ketchup, pickles, or any other desired hamburger toppings.
