Begin by placing the beef stew meat evenly in your crockpot. Sprinkle the onion soup mix generously over the beef, ensuring every piece is coated with flavor.

Pour the beef broth over the seasoned meat, followed by a splash of Worcestershire sauce to deepen the flavor.

Sprinkle in your garlic powder, onion powder, and black pepper, stirring everything gently to incorporate.

Cover the crockpot with its lid and set it on low heat for 7-8 hours, or on high for 3-4 hours.

While the beef is slow-cooking, prepare your egg noodles according to package instructions, about 7-10 minutes in boiling salted water.

In a bowl, mix together the sour cream, cornstarch, and a small amount of water until smooth.

Stir the sour cream mixture into the crockpot, gently mixing it with the beef and broth.

Finally, add the previously cooked egg noodles into the crockpot, mixing thoroughly to combine with the beef and sauce.