This slow cooker version of the classic soup is super easy to make. We used chicken thighs because they're less expensive than breasts and tend not to dry out. If you like, skip the noodles and stir in your favorite cooked grain at the end.
The use of bone-in, skin-on chicken thighs is excellent for slow cooking as they impart more flavor and moisture, preventing dryness. Adding herbs like parsley and thyme as sprigs allows for easy removal and prevents over-infusion. Be mindful to add the wide egg noodles only during the last 15 minutes of cooking; this prevents them from becoming mushy and overcooked. The lemon juice added at the end is vital for brightening the soup's flavor, so adjust to your preference. Always taste and adjust salt and pepper before serving for perfect seasoning. The small piece of onion with root intact provides subtle aromatic depth and is easily removed.