Double RL Ranch Burger

Name: Double RL Ranch Burger
Ingredients: 1/2 cup mayonnaise (preferably Hellmann's or Best Foods); 1/3 cup ketchup (preferably Heinz); 2 tablespoons sweet relish; 1 tablespoon finely chopped cornichons; 1 tablespoon finely chopped red onion; 1 teaspoon Worcestershire sauce; 1/2 teaspoon garlic powder; 1/2 teaspoon onion powder; 1/4 teaspoon hot sauce (preferably Tabasco); Kosher salt, freshly ground pepper; 3 pounds ground beef chuck (20% fat); Kosher salt; 8 ounces clothbound cheddar (such as Cabot), thinly sliced; 8 sesame buns, toasted; 16 slices bacon, cooked; Green leaf lettuce, sliced tomato, sliced red onion, and sliced pickles (for serving)