Like onions, anykind of sauce like dales or moore's, french onion soup mix, or any kind of seasonings.
I add Worcestershire sauce and natures seasoning.
oh various things, peppers, onions, worst sauce, sometimes and egg and GF breadcrumbs....
I have never done the ranch seasoning, though my neighbor swore that made the best burgers.
onions, cheddar jack cheese, thick bbq sauce with a dash of maple syrup, crumbled bacon, garlic and pepper. Heaven.
Sometimes I do, sometimes not. Just depends on my mood.
Nothing is better in a hamburger patty than some Alpine seasoning.