1. Make egg noodles ahead of time. 2. Heat 1 tablespoon oil in a large skillet over Medium-High heat. Sear beef in several batches, making sure not to overcrowd the pan. Add more oil as needed. Set beef aside. 3. Add butter to the pan. Add onions to the pan and cook for 1 minute. Add mushrooms to the pan and cook for 5 minutes. Add garlic, salt, and pepper to the pan and cook for 1 minute more. 4. Push the vegetables to one side of the pan and pour in beef broth.
5. Sprinkle Xanthan Gum over the broth, and quickly whisk it in. Bring to a low simmer, 1-2 minutes, stirring all the time. 6. Measure sour cream and add to a small bowl. Quickly whisk some of the hot broth into the sour cream to temper it. Pour the sour cream mixture into the pan and cook for 5 minutes until thickened. 7. Add beef and any residual juices to the pan and simmer for 2 minutes more.
It only takes about 40 minutes to make this Keto Beef Stroganoff recipe. So you can make it for special occasions or on weeknights or just because you feel like eating a homey beef and noodles dinner. It is total comfort food.