Hi, I'm the developer of Recipe Cart extension 👋 Instead of buying me a coffee, check out the best coffee I've ever had (And it's instant!)
Export 12 ingredients for grocery delivery
Combine beef, black pepper, dry mustard, ketchup, Worcestershire, soy sauce, egg, cayenne, and bread crumbs in a mixing bowl. Use a fork or your hands to stir the ingredients until very evenly distributed.
Cover with plastic wrap and refrigerate for 2 hours, or up to overnight.
While the meat is resting, melt 2 tablespoons butter in a large nonstick pan over high heat; add mushrooms, onions, and a pinch of salt. Saute, stirring occasionally, until very nicely browned, 5 to 8 minutes. Reduce heat to medium and add flour. Cook and stir for 3 minutes.
Stir in ketchup, Worcestershire sauce, and beef broth; increase heat to high. Bring to a simmer; reduce heat to medium and cook, stirring occasionally, until the gravy thickens slightly and reduces, about 10 minutes. Taste and adjust salt as needed. Transfer to a glass measuring cup, scraping the pan clean with a spatula, and reserve.
Remove meat from the refrigerator and divide into 4 equal portions. Moisten hands and form into oval patties, about 1/2 inch thick. Season both sides of the patties lightly with salt.
Melt 2 tablespoons butter in the previously used nonstick pan over medium-high heat. Add the patties and cook until browned, 2 to 3 minutes per side. Pour in gravy and bring to a simmer; reduce heat to medium and continue to cook until gravy is piping hot, and the meat is just cooked through and springs back lightly when touched, about 5 minutes.