Google search yields 3,320,000 hamburger recipes. But why waste time and effort; here is the perfect recipe.
The secret to a perfect hamburger is the level of fat in the meat. Buy lean, not extra lean ground beef, and you have all you need to make those perfect burgers.
Sprinkle the meat with a bit of salt (not too much, I typically use a quarter tsp for a pound of meat) and a bit of pepper. Forget about anything else you read that tells you to add breadcrumbs, onions, ketchup, eggs, etc. All you need is salt and pepper.
Make the patties large enough to fit in the palm of your hand.
Sprinkle the grill with a drop of vegetable oil and turn on the heat to high. Grill 5 minutes on one side and 3 on the other side for medium, or up to 5 minutes for well done.
The smell and taste of these burgers is what you imagine sailors of the 18th century ate what they referred to then as "steak cooked in the Hamburg style".
The cat had to be restrained throughout the meal after his immediate attack on the patties!