In a medium saucepan, heat 1 tablespoon of butter or oil. Add the diced onion and sauté 3–4 minutes until softened. Stir in the minced garlic for the last 30 seconds.
Pour in the chicken broth and add the mild green chiles, garlic powder, onion powder, and cumin. Bring to a gentle simmer.
Stir in the cream of chicken soup or sour cream. Heat on low until smooth and creamy.
Add the cooked chicken and simmer for 5 minutes.
Stir in the cooked noodles and warm through. If the soup thickens too much, add a splash of broth or water.
Taste and adjust seasoning with salt, pepper, lime, or extra green chile. Serve warm.