Pound an oil-cured filet and mix it well into the beef for briny flavor.

A teaspoon brightens the flavor of cooked beef with mellow spiciness.

A few dried porcinis that have been ground in a spice grinder give patties a deeper meatiness.

An egg enriches the flavor of beef and helps to keep the burger moist as it cooks.

A tablespoon of herbed bread crumbs helps bind the ground meat and adds a toasty flavor.

Half of a small, coarsely grated onion gives sweet notes and juiciness to burgers.

A few pinches of this powdered mixture of beef bouillon and dried onion enhance a burger’s meaty depth.

A few tablespoons of a dry, tannic red wine infuse burgers with peppery notes.

A drizzle of this East Asian staple adds a nutty essence.

A teaspoon or so of this Asian-style garlic chile sauce imparts a subtle heat and sweetness.

A tablespoon of sweet and tangy A1, a condiment made with tomatoes, vinegar, and dried fruit, intensifies a burger’s beefiness.

A few dashes of this sweet-tart sauce lend tang and depth.

A teaspoon of finely chopped capers gives burgers a pleasing, concentrated saltiness.