The definition of a Bunless burger is a burger without the bun.  As we all know, all the fast-food restaurants serving burgers offer various bread buns where the burger is placed into the middle and layered with extras like bacon, cheese, and whatsoever.  But the bun is always there. It has always been like this in fast-food restaurants until the last few years, where more healthy approaches and lifestyle have become introduced. Nowadays, you will find so many fast-food chains offering Keto burgers or burgers without a bun. They normally replace the bun with salad leaves and wrap it in the plastic paper. But there are so many variations you can use if you would like to make a perfect bunless burger. You can decorate those patties with whatever you wish to, like cheese, veggies, bacon tomatoes, onion, and you can wrap it in salad leaves or any of the vegetable leaves. You can also use the burgers or Patties as the buns. Use two Burgers and in the middle, you can layer them with cheese, veggies, tomatoes, pickles, bacon, and whatever you wish and desire.