Crisp bacon slices in a skillet until crunchy; set aside.
Form ground beef into two patties, season with salt and black pepper, and cook on high heat for 4 minutes per side.
Top patties with cheddar cheese slices during final minute to melt.
Toast burger buns with butter.
Assemble burgers with lettuce, sliced tomato, cheesy beef patties, and crisp bacon.