Heat the vegetable oil in a large skillet over medium-high heat.
Sprinkle the steaks with the salt, pepper, garlic powder, onion powder, and paprika.
Add the steaks to the hot skillet and cook until they are browned on both sides and cooked to your desired doneness, about 4-5 minutes per side for medium-rare.
Remove the steaks from the skillet and set aside.
Add the butter to the skillet and melt over medium-high heat.
Add the mushrooms and cook until they are tender, about 3-4 minutes.
Stir in the beef broth, Worcestershire sauce, and parsley.
Bring the mixture to a simmer and cook until the sauce has thickened, about 5 minutes.
Return the steaks to the skillet and spoon the mushroom sauce over the steaks.
Serve the steaks with mashed potatoes and a side salad.
Interesting Facts
Flat-iron steak is a cut of beef that is tender and flavorful.
It is a relatively lean cut of beef that is great for grilling or pan-searing.
Mushroom sauce is a classic accompaniment to steak, adding a rich and flavorful sauce.
The steak and mushroom sauce can be served with mashed potatoes or other side dishes for a complete meal.