Wagyu Wellington

What is it?

Wagyu beef patty, mushroom, truffle-flavoured mayo, cheese, and crispy onions are stacked in a burger build that borrows from beef Wellington. Patty sits with a rich, earthy sauce and a soft cheese layer, while the onions bring some crunch to break up the softer textures. Placed in the Gourmet King range in the UK, it's the most assembled-looking burger in that lineup, with more savoury extras than the standard cheeseburger-style options. Truffle mayo adds a funky, aromatic note that you won't find in any other burger on the menu, and the mushroom layer reinforces that earthy direction. Wagyu blend in the patty means a slightly richer, fattier bite than the standard flame-grilled beef, though it's still a fast-food patty rather than a steakhouse cut.