I personally don't put egg in my hamburger patties, I only do that with my meatloaf, but to each their own. I would add one little extra step when forming your patties...take your thumb & make an indentation in the center of the patty, so that when your burger cooks & expands, that indentation allows for the patty to "even out". Try it, you'll see what I'm saying is true. Happy Memorial Day. P.s. I too prefer 70/30 ground beef, it has more taste.
I personally don't put egg in my hamburger patties, I only do that with my meatloaf, but to each their own. I would add one little extra step when forming your patties...take your thumb & make an indentation in the center of the patty, so that when your burger cooks & expands, that indentation allows for the patty to "even out". Try it, you'll see what I'm saying is true. Happy Memorial Day. P.s. I too prefer 70/30 ground beef, it has more taste.