Step 1

In your instant pot, combine stew meat, beef broth, worcestershire sauce, Italian seasoning, onion powder, garlic powder, and salt and pepper to taste. Place lid on the instant pot, make sure the vent nozzle is in the non-venting position, press "pressure cook" and set timer to 1 hour.

Step 2

Move venting nozzle to the vent position and allow to vent until the button drops down. Remove lid, and switch Instant Pot to "soup" mode. Stir together sour cream and 1 cup of broth from the Instant Pot until smooth. Stir mixture back into the pot along with the mushrooms. Whisk together cold water and corn starch in a bowl.

Step 3

Once soup is boiling, whisk corn starch mixture into the Instant Pot until soup thickens. Stir in noodles. Taste, add salt and pepper to taste, if needed. Garnish with cracked black pepper, fresh thyme or parsley, and grated parmesan cheese and serve.

Step 4

In your slow cooker, combine stew meat, beef broth, worcestershire sauce, Italian seasoning, onion powder, garlic powder, and salt and pepper to taste. Cover and cook on high 3 hours, or low 6 hours.

Step 5

Stir together sour cream and 1 cup of broth from the slow cooker until smooth. Stir mixture back into the pot along with the mushrooms. Whisk together cold water and corn starch in a bowl, then stir into the slow cooker.

Step 6

Cover and cook on high for 1 hour longer. Taste, add salt and pepper to taste if needed. Add cooked noodles. Garnish with cracked black pepper, fresh thyme or parsley, and grated parmesan cheese and serve.