PREHEAT GRILL: Preheat the grill to medium-high heat.
FORM PATTIES: In a large bowl, combine 2 pounds ground beef, 2 tablespoons Worcestershire sauce, 2 ½ tablespoons hickory liquid smoke, 1 tablespoon crushed peppercorn blend, and 1 teaspoon kosher salt. Mix gently just until combined. Divide into 4 equal patties slightly larger than the hamburger buns. Press a shallow indentation in the center of each patty.
OIL PATTIES: Lightly brush each patty with 1 tablespoon extra virgin olive oil to prevent sticking.
GRILL: Place patties on the hot grill. Cook for 3 minutes without moving, until grill marks form. Flip and cook another 3 minutes for medium, or until internal temperature reaches 160°F.
ADD CHEESE: During the last minute of cooking, top each burger with 1 slice mild cheddar cheese and close the grill lid to melt.
TOAST BUNS: Place hamburger buns cut-side down on the grill and toast briefly until grill marks appear. Watch closely to prevent burning.
ASSEMBLE: Place each burger on a toasted bun. Top with 1 slice bacon (cut in half) and 2 slices red onion. Cap with the top bun and serve immediately.
Notes
Beef Tip: 80/20 ground beef provides the best flavor and juiciness. Leaner blends can dry out quickly.Do Not Press: Avoid pressing down on burgers while cooking. This squeezes out juices.Make-Ahead: Patties can be formed up to 24 hours in advance and refrigerated.Storage: Store cooked burgers in the refrigerator for up to 3 days.Reheating: Reheat gently in a skillet over medium heat or in a 350°F oven.