This version of Chicken Tortilla Soup isn’t spicy as long as you use mild tomatoes and green chilies and mild chili powder. However, if you’d prefer to spice this soup up a bit, you could add some smoky chipotle sauce, diced jalapenos, or use a nice hot chili powder.You can absolutely make this soup in a pot on your stove. You will make it in the same exact manner, except it will need to simmer for 45-50 minutes on the stove.You can use any type of cooked chicken in this recipe. I actually prefer to cook up a big batch of boneless, skinless, chicken thighs so I can use the meat throughout the week for speedy meals. I think the dark meat from the thighs is more meaty and moist than meat from cooked chicken breasts.I love to use the meat from a rotisserie chicken for making this soup – it works great and makes dinner go even faster!Adding the spices to the heat first does what’s called “blooming”. The heat intensifies the flavors of the spices because it forces them to release their essence.After you make this soup in your Instant Pot, it will automatically switch to the “keep warm” setting until you’re ready to eat. Or, if you’d like to warm the soup up at a later time, you can use the sauté setting to reheat the soup.