Flat Iron has officially launched its hotly anticipated new burger today, 7th July – introducing the mouth-watering Smashed Onion Double Cheeseburger to menus across the country, including its popular restaurant on Lands Lane in Leeds.
Created by Flat Iron’s Head of Beef, Fred Smith, the restaurant’s signature burger only changes once a year. That makes this annual launch one of the most eagerly awaited dates on the calendar for both local foodies and the Flat Iron team themselves.
As any burger purist knows, some of the absolute best burgers are built on just a few incredibly high-quality ingredients. For Flat Iron’s latest creation, everything starts with two juicy patties made using premium beef sourced locally from their very own herd in North Yorkshire. Next come paper-thin slices of sweet white onion, which are smashed directly into and around the beef as it sears on the grill. The magic lies in the cooking process, as some of the onion slices beautifully caramelise, some steam through the meat, and others keep a subtle, satisfying crunch.
The double cheeseburger is then topped with American mustard, melted cheese, crunchy pickles, a rich ketchup bearnaise, and crispy batter scraps. The crispy scraps are a brilliant tip-of-the-cap to Flat Iron’s wildly popular ‘Bearnaise Burger’ from the summer of 2023. The entire creation also pays a lovely homage to the classic ‘Fried Onion Cheeseburger’ popularised by George Motz, the famous American hamburger enthusiast, chef, and author of Hamburger America.
Speaking about the exciting new launch, Fred Smith said: “Launching our annual burger is always one of the highlights of the year for us. We spend months refining it, and this year’s version is all about celebrating how good beef, onion, mustard and cheese can be when every element is done properly.
“The onion-smashing technique creates an incredible depth of flavour, while the ketchup béarnaise brings a richness that ties everything together. It’s simple, messy and incredibly satisfying.”
The Smashed Onion Double Cheeseburger is officially rolling out today and is available to order right now at Flat Iron Leeds.
