01 -
Clean mushrooms by wiping with a damp paper towel, dry thoroughly, then chop and set aside. Avoid washing with water to prevent them from becoming slimy.
02 -
Combine ground beef, one packet of onion gravy mix, diced onion, crushed saltines, milk, beaten egg, and all seasonings (onion powder, garlic powder, black pepper, and dried parsley). Mix gently until just combined.
03 -
Shape meat into 6-8 thick patties, about 1.5 inches thick and 3.5-4 inches wide. Form into balls first, then press into patty shapes.
04 -
Heat 1 tablespoon butter in a large skillet. Cook patties for 6-7 minutes per side until well-browned, working in batches if needed. Set aside on a clean plate.
05 -
In the same skillet, melt remaining butter and cook mushrooms until golden brown. Season with Worcestershire or soy sauce and black pepper.
06 -
Return patties to skillet with mushrooms, add beef broth, and simmer covered for 25 minutes on low heat, occasionally flipping patties.
07 -
Whisk remaining gravy packets with 1.5 cups of hot liquid from skillet. Add back to pan and simmer 8 more minutes until thickened. Rest 5-10 minutes before serving.