Meet The Klaus Burger at What's UR Favorite in Streamwood, IL. It's massive. It's huge. It's delicious. It's a 1/3 lb. burger with cheese, topped with an onion ring, with a scoop of chili, bacon, barbecue sauce, repeat steps 1–5, finish with lettuce, pickles, and tomato. Holy cow! Definitely not something to eat everyday but it was a really yummy dinner to split with my hubby.