In a skillet on medium heat, cook down your bacon; about 10 minutes. Set bacon aside.
In the same skillet, brown your onions for about 5 minutes, then add brown sugar. Cook for another 2-3 minutes.
Add whiskey, Worcestershire sauce, and black pepper. Let this cook down for about 2-3 minutes. Simmer on the side burner while the burgers are cooking.
Form about quarter lb patties (I prefer third pound) season each side with salt and pepper.
With your grill heated to about 450F, place your burgers on the grill and cook for about 3-4 minutes.
Flip and place off heat. Cook for another 5-6 minutes with cheese melting on top.
Place burgers on buns with lettuce, and top with that whiskey sauce. Enjoy!
