The Double Cheeseburger at Portillo’s has two flame-grilled beef patties on a soft, toasted bun with melted American cheese on top. This burger has twice as much protein and flavor as a typical cheeseburger, plus you can still add fresh toppings like lettuce, tomato, onions, pickles, ketchup, and mustard. If you want a big, filling burger, this is the best pick.
