| 1 pound 90 percent lean ground beef | shape into 4 patties and season both sides | sear patties in hot oil for 3 minutes, flip and cook 1 minute, top with cheese and cook until melted | assemble burgers with onion mixture and buttered bun tops |
| 1/2 teaspoon vegetable oil |
| 4 slices American cheese |
| 9 tablespoon salted butter softened | melt 1 tbsp butter with onion and water, cook covered until tender then uncovered until translucent and beginning to brown |
| 1 onion chopped |
| 1 tablespoon water |
| 9 tablespoon salted butter softened | spread 2 tbsp butter on each bun top |
| 4 hamburger buns toasted |
| throughout: salt and pepper |