I don't know if they're in Seattle, but Smashburger has a "classic" burger that's as plain as possible -- American cheese, lettuce, tomato, meat, ketchup, and m

I don't know if they're in Seattle, but Smashburger has a "classic" burger that's as plain as possible -- American cheese, lettuce, tomato, meat, ketchup, and mustard on a bun you can bite through.