It's bigger than a Big Mac and it's cheesier than a Quarter Pounder with cheese.
Starting March 3, Americans can finally try McDonald's newest menu item - the Big Arch - but bosses say, for now, it is not a permanent addition in the US as it is some countries.
The Big Arch is a new, supersized burger featuring two beef patties, three slices of white processed cheese, crispy and fresh onions, pickles, lettuce and a brand-new tangy 'Big Arch' sauce.
It all comes in a sesame and poppy seed bun - a nod to the iconic Big Mac, which uses a sesame seed bun.
'It's like all your favorite McD burgers in one burger,' McDonald's said. Burger fans who tried the Big Arch abroad described it as 'massive', with one saying it felt like 'two Big Macs in one'.
The Big Arch, thought to cost around $6 to $10 depending on location, is the chain's biggest burger ever, clocking in at 1020 calories and 53g of protein in the US. A Big Arch Meal, with a medium coke and medium fries, is 1610 calories.
The burger was tested in Canada, the UK, Portugal, Germany and France - where bosses say it proved a hit - before finally launching in the US more than two years after it was first mooted.
It is likely that if the Big Arch sells well in the US - and is profitable - then it will become a permanent addition as it has in the UK.
McDonald's has not yet said how much the Big Arch burger will cost in the US. Prices typically vary based on franchise location.
In Canada, a Big Arch meal with fries and a drink was priced at about $12.59 - roughly $9 in US dollars - positioning it as a step up from existing burgers but still cheaper than many rivals.
'Customers are responding to this more satisfying burger that meets demand for something heartier while still feeling distinctly McDonald's,' global chief restaurant experience officer Jill McDonald said.
Fans in the US are already itching to try this new burger. 'Had this when it was in Canada,' one Reddit user said. 'In my opinion, I prefer the Big Arch over the Big Mac and the Quarter Pounder. I find the ratio of everything quite pleasing and tasty.'
McDonald's describes the new Big Arch sauce as 'tangy and creamy,' with a mix of mustard, pickle, and sweet tomato flavors.
The plan for the bigger burger came after McDonald's fought to win customers back after 2024 saw the company report its first sales decline since Covid lockdowns shut restaurants.
A slew of offers, including a four-item meal deal for $5, in the second half of 2024 and into 2025 helped boost sales.
McDonald's has tested bigger options before.
In January 2023, the Double Big Mac -- with four patties instead of two and extra sauce -- returned for a limited time for $7, and was a hit while on sale for a month.
McDonald's remains one of the world's largest franchises, but it is now longer the biggest after being dethroned by Chinese cafe chain Mixue Ice Cream & Tea.
The Big Arch push also comes as McDonald's faces fresh scrutiny over other parts of its menu.
The company was recently hit with a proposed class action lawsuit over the McRib, with four plaintiffs accusing the fast-food giant of misleading customers about what the sandwich actually contains.