You've seen McDonald's CEO awkwardly taste the new Big Arch burger. Here's how it compares to other favorites. The Big Arch is a hamburger sold by the fast food restaurant chain McDonald's. Intended as a large, high-calorie addition to the core burger menu, it was first trialed in Portugal and Canada in 2024 before being launched in the United Kingdom, Australia and New Zealand in 2025 and the United States in 2026. McDonald's Big Arch burger is here for a limited time. Here's what's in it, what it costs and how to save money before you order. McDonald's introduced the Big Arch burger to the U.S. menu after it was first served at international locations. I tried it to see how it actually tastes. Enjoy a juicy double-patty burger with melty cheese, crispy onions and tangy BIG ARCH™ sauce on a sesame seed bun. Try one today at a McDonald’s near you! What is McDonald’s new Big Arch Burger? The brand is touting its new limited-time item as the “most McDonald’s, McDonald’s burger” yet, with big flavor and a big size.