Add the cream of chicken soup and chicken broth to the slow cooker, stir until smooth.
Add the tarragon, pepper, mushrooms and onions, stir.
Add the chicken breasts.
Cover the slow cooker and cook on LOW for 6 hours without opening the lid during the cooking time.
After the cooking time is up, start cooking the pasta according to the package directions to Al dente on the stove-top, do not over cook!
Shred the chicken with 2 forks.
Add sour cream and half of the cheese, stir.
Add the cooked and drained pasta and stir again.
Sprinkle over remaining cheese. Cover the slow cooker and cook for an additional 20 minutes on low.
Serve and enjoy!
Video
Notes
Is this recipe freeze-friendly (make ahead freezer meal)?Since sour cream doesn't freeze very well, this is a recipe that you'll want to freeze in parts and then cook it according to the directions. You can combine everything up until the sour cream, freeze, and then defrost and cook according to the directions.How do I store: Any leftover pasta can be put into an airtight container and kept in the refrigerator for up to 3 or 4 days.Variations
If you have extra picky eaters and want to omit the mushrooms and onions add an additional 1/2 cup of broth. This will replace the moisture from the mushrooms and onions.
You could always add more vegetables such as peas, corn, broccoli, bell peppers, green chiles and the like.
Rotini pasta is another go-to pasta that can be used to substitute the penne pasta. If anything, use whatever you have in your pantry. Egg noodles can be used, though you have to be EXTRA careful not to overcook.
You can use Italian seasoning, onion powder, garlic powder, or even dried basil! Make the dish your own with your favorite spices.