No beef whatsoever, well at least in my experience....
....I suppose I should explain. I worked close to a Five Guys and everyone used to rave about their burgers so one day, being Billy-no-mates I took a walk over there on my lonesome to try them out. I ordered the big sized bacon cheesberger with everything on it. Nibbled on a few peanuts while I anxiously awaited my number to be called. When it finally was I picked up my order and retired to a table to indulge. On unwrapping the burger, it was massive so I began to get my chops around it, lettuce, bacon, onions, tomato, cheese, special sauce, the lot. Having devoured over half of it I thought "Wait a minute!" and started probing amongst the mess I was making to discover, no beef patties. I searched and I searched but to no avail. Panic set in. Should I take it back to be ridiculed either because in their eyes a bacon cheesberger maybe just includes bacon and cheese (more like a bacon sarnie with extras) or because I'd eaten close to 75% of a $10 burger before noticing they'd forgotten to put the beef on! In the end I did what I always do, sloped off quietly to avoid my own blushes. I did however return a few days later to repeat my order, and did get the beef