Mixing the sour cream and cornstarch with a small amount of hot broth helps to temper the mixture so that you can avoid any clumps in the soup.
It only takes a few minutes to get a really nice sear on the beef pieces. Avoid overcooking the meat at this stage.
You don’t want to boil the sour cream. So once you add it to the pot, be sure to keep the soup at a simmer until it is finished cooking.
To Store:Keep leftovers in an airtight containerin the fridge for up to 3 days. The noodles will continue to absorb liquid from the broth, so you may prefer to eat it sooner than that though.
To Freeze:If you’d like to freeze this soup, make it without the noodles. Freeze for up to 2 months. When you’re ready to serve, thaw and reheat, adding freshly cooked noodles.
Crockpot Instructions:Sear the beef and then transfer it to the slow cooker. Then saute the mushrooms, onions, and garlic, and transfer those to the pot.Add beef broth, tomato paste, and Worcestershire sauce, and cook on low for 6-8 hours, or high for 4-6 hours.Cook the egg noodles separately on the stovetop,Before serving, stir in the noodles and a slurry of sour cream, cornstarch, and 1 cup of hot broth from the pot. Heat over the “warm” setting until thickened.
Sear the beef and then transfer it to the slow cooker. Then saute the mushrooms, onions, and garlic, and transfer those to the pot.
Add beef broth, tomato paste, and Worcestershire sauce, and cook on low for 6-8 hours, or high for 4-6 hours.
Cook the egg noodles separately on the stovetop,
Before serving, stir in the noodles and a slurry of sour cream, cornstarch, and 1 cup of hot broth from the pot. Heat over the “warm” setting until thickened.