Begin by setting the Instant Pot to Sauté mode. Pour in the olive oil and let it heat until shimmering. Add the beef stew meat and season generously with salt and pepper. Brown the beef on all sides for about 5 minutes.
With the beef nicely browned, stir in the diced onion and minced garlic. Sauté together for approximately 2-3 minutes until the onion becomes translucent and fragrant.
Introduce the sliced mushrooms to the pot, followed by the Worcestershire sauce, paprika, and thyme. Stir well to combine all ingredients and allow them to mingle for another minute.
Carefully pour in the beef broth, taking a spatula to scrape the bottom of the pot to lift all the flavorful brown bits. This step is crucial for adding depth to your stroganoff.
Secure the lid on the Instant Pot and set the valve to sealing. Switch to Pressure Cook mode and set the timer for 10 minutes. When the cooking cycle ends, let it naturally release for 5 minutes before performing a quick release for any remaining pressure.
In a small bowl, whisk together the flour and sour cream until smooth. This mixture will help thicken your sauce. Stir this into the beef and mushroom mixture in the pot, blending it thoroughly until fully incorporated and creamy.
Add the egg noodles directly into the pot, ensuring they are spread out and submerged. If necessary, add a splash more beef broth to fully cover the noodles. Seal the lid again and set to Pressure Cook for an additional 4 minutes.
After cooking, perform a quick release. Open the lid and gently stir the stroganoff to ensure the noodles are well coated in the creamy sauce. Taste and adjust seasoning with more salt and pepper, if needed.
Dish out the beef stroganoff into bowls or plates, garnishing generously with fresh chopped parsley for a pop of color and freshness.
Notes
Serve with a side of crusty bread or a simple green salad for a well-rounded meal.