Ingredients
Method
- Sear the Beef: Heat olive oil in a large skillet over medium-high heat until it shimmers. Add beef strips in a single layer (do not crowd). Let sit undisturbed for 1 minute to form a crust. Flip and cook for 30 seconds. Remove to a plate, cover loosely, and save all juices.
- Sauté the Vegetables: Reduce heat to medium. Melt the butter in the skillet. Add chopped onion and sliced mushrooms. Cook for 6-8 minutes until the released liquid evaporates and vegetables are soft and golden brown.
- Build the Flavor Base: Push vegetables to the edges. Add minced garlic to the center and stir constantly for 1 minute. Sprinkle flour evenly over the vegetables and stir continuously for 1 more minute to cook the flour.
- Create the Creamy Sauce: Slowly pour in the beef broth, using a wooden spoon to scrape up all browned bits from the bottom of the pan. Stir in the heavy cream. Bring to a gentle simmer for 1-2 minutes until thickened.
- Temper the Sour Cream: Place sour cream in a small bowl. Whisk in about 2 tablespoons of the hot sauce from the skillet to warm it up. Stir this warmed mixture back into the skillet to ensure a smooth, uncurdled sauce.
- Final Seasoning and Assembly: Stir in Worcestershire sauce, Dijon mustard, salt, and pepper. Taste and adjust salt. Return the beef and its resting juices to the pan. Simmer for 1 minute until warmed through. Remove from heat immediately and serve over egg noodles. Garnish with green onion or parsley.
Notes
Reheating: Reheat leftovers in a skillet over very low heat with a splash of beef broth. Do not microwave or rush the process, or the sauce will break. Freezing is not recommended.
