4 cups hot cooked rice (or about 8 ounces egg noodles, cooked)
Instructions
Meanwhile, melt the butter in a large skillet over medium heat. Cook the mushrooms until golden brown, stirring frequently. Remove the mushrooms to a plate and set aside.
Add the ground beef and onions to the skillet and cook until the ground beef is no longer pink and onion is tender. Drain and discard excess fat.
Stir the flour into the ground beef mixture until well absorbed. Cook for about 1 minute, stirring constantly. Add the beef stock and mushrooms; stir in salt and ground black pepper. Cook until thickened.
Add the sour cream and heat through.
Serve the ground beef stroganoff over the hot cooked rice or noodles.