Yesterday afternoon Canadian chef Ted Reader made a 590-pound burger in downtown Toronto in an attempt to bread the Guinness World Record for Largest Hamburger, reports the Toronto Sun. The record is currently held by Mallie's Sports Grill and Bar in Southgate, Michigan, for their 185-pound burger. Reader's burger was cooked on a giant grill by Napoleon.
I doubt this burger is going to be Guinness-approved, unless it becomes commercially available. For an example of a larger one-off burger, the burger from last Saturday's El Reno Fried Onion Burger Day was a whopping 750-pounds. As for what happened to that 300-pound burger in Japan that was being sold for 150,000 yen...maybe no one wanted to buy it.
Poking back into the archives, in 2006 the world's largest commercially available burger was a mere 29.6 pounds. Oh, humanity, how far we've come.