Burger King has expanded its King’s Collection with the launch of the new Big King XL offering at select restaurants across the US.

Big King XL features more than 226g of flame-grilled beef, alongside melted American cheese, sliced onions, pickles, lettuce and a savoury sauce, which are served on a toasted sesame bun.

“The burger chain has launched a promotion to offer a free Big King XL in exchange for MacCoins.”

The burger is available for a limited time for $5.59 and joins other offerings in the King’s Collection such as Bacon King and Double Quarter King.

The burger chain has also launched a promotion to offer a free Big King XL in exchange for MacCoins, which were originally released as a promotional offer at McDonald’s, which expired on 31 December last year. Burger King’s offer is running at select restaurants in Chicago, Illinois.

Last month, the Burger King introduced a $6 King Box for a limited time. The meal featured either a Whopper, Crispy Chicken burger, Spicy Chicken burger or three-piece Chicken Tenders alongside fries, a soft drink and a dessert.

Established in 1954, Burger King has more than 17,000 restaurants in 100 countries. Almost all of its restaurants are owned and operated by independent franchisees.