Burger Patties and Cheese:
- 30 ounces ground chuck (20 percent fat)
- 2 1/2 tablespoons bourbon (recommended: Bulleit brand)
- 1 1/2 tablespoons Worcestershire sauce
- 1 1/4 teaspoons dried oregano
- 1 1/2 teaspoons ground cumin
- 1 1/4 teaspoons table salt
- 30 grinds fresh black pepper
- 6 ounces Dubliner cheese (Kerrygold brand), thinly sliced and divided into 6 (1-ounce) servings
Sauteed Onions:
- 1 tablespoon olive oil
- 1 tablespoon unsalted butter (European style)
- 1 large Vidalia onion, halved (through the core) and thinly sliced (1/4-inch)
- 1/4 teaspoon table salt
- 8 grinds fresh black pepper
- 1/4 teaspoon dried oregano
- 1/4 teaspoon ground cumin
- 1/4 cup bourbon (recommended: Bulleit brand)
Brioche hamburger-sized buns, halved
- 3 tablespoons unsalted butter (European style), at room temperature
