Season the 1 pound chicken drumsticks and 1 pound boneless skinless chicken breasts with Kosher salt and ground pepper on both sides. Turn on the SAUTE function of the Instant Pot, add 1 tablespoon olive oil, and sauté the 1 medium sweet onion, 3 medium carrots, 3 stalks celery, 1 parsnip, and 1-2 garlic cloves for 5-6 minutes until softened and fragrant.
Add the diced 3 medium potatoes, seasoned chicken, and 2 teaspoons Italian seasoning to the pot.
Pour in the 12 cups low-sodium chicken broth and stir to combine. Secure the lid, set the valve to SEAL, and cook on the MANUAL or SOUP setting for 15 minutes. When done, carefully quick-release the steam.
Remove the chicken and place it on a large plate. Press SAUTE again and add the 5 ounces egg noodles to the soup. Cook for 4-5 minutes, then press CANCEL. While the noodles cook, shred the chicken and discard any bones.
Return the shredded chicken to the pot and stir well to mix everything together.
Garnish generously with freshly chopped parsley and serve hot.
Notes
Dice veggies small so they cook evenly under pressure.
Add noodles after pressure cooking to avoid mushiness.
Shred the chicken while the noodles cook to save time.
A splash of lemon juice at the end brightens the broth.
Stir in frozen peas before serving for extra flavor and color.
Storage & Reheating
Fridge: Store in an airtight container for up to 4 days.
Freezer: Freeze (without noodles) for up to 3 months. Thaw overnight in the fridge.
Reheat: Warm on the stovetop or in the microwave until heated through. Cook fresh noodles separately if frozen.