Season the steaks with salt and black pepper, evenly and generously on both sides.
4-5 beef tenderloin steaks
Heat one tablespoon of olive oil in a large skillet over medium-high heat. Add the steaks and sear them until a brown crust forms, about 2-3 minutes per side. Place the seared steaks on a plate and set aside.
2 Tablespoons olive oil
Using the same skillet, add the remaining tablespoon of olive oil. Sauté the chopped onion until translucent, then add the minced garlic and cook for another minute.
1 cup onion, 2 cloves garlic
Add the sliced mushrooms to the skillet and cook until they are golden brown and tender, about 4-5 minutes.
8 ounces Baby Bella mushrooms
Pour in the Marsala wine and beef broth, scraping the bottom of the skillet to loosen any browned bits. Allow the mixture to simmer for about 5 minutes to reduce slightly. Add in the Italian seasoning and stir. Sprinkle half of the flour and mix until it is well incorporated.
3/4 cup beef broth, 1/2 cup Marsala wine, 2 teaspoons Italian seasoning, 3 teaspoons all-purpose flour
Return the seared steaks to the skillet. Let the mixture simmer for an additional 3-4 minutes, allowing the flavors to meld together and the sauce to thicken. Check the temperature of the steaks so they are cooked to your preference. If the sauce is still not thick enough, add in the remaining flour.
Once the sauce has thickened, add in the butter in smaller pieces until it melts and coats the beef and mushrooms evenly. Adjust seasoning with salt and pepper according to taste.
2 Tablespoons butter, salt and black pepper
Transfer the Beef Marsala to a serving dish and garnish with freshly chopped parsley. Serve hot, accompanied by your choice of side dishes such as mashed potatoes.
fresh parsley