7 ounces ground prime beef (20 percent fat), at room temperature
Softened butter
Kosher salt and freshly ground black pepper
Potato bun, sliced in half
Iceberg lettuce leaf
Slice beefsteak tomato
Slice dill pickle
1 tablespoon LT Pickled Mayo, recipe follows
6 tablespoons mayonnaise
3 tablespoons ketchup
2 tablespoons sweet relish, drained and rinsed
1 tablespoon chopped cornichons
2 tablespoons chopped pickled jalapeno
1 tablespoon Cognac
Salt and pepper, to taste