On Instant Pot, press Saute and wait until display says Hot. Add 1 tablespoon of oil and garlic; saute for about 1 minute. Press Cancel.
Add half of tortilla strips, chicken, black beans, corn, broth, tomato sauce, chipotle in adobo, cumin, chili powder, salt and pepper.
Close the lid, turn pressure vent to Sealing and press Pressure Cook on High or Manual for 20 minutes.
While soup is cooking, preheat large ceramic non-stick skillet on medium heat and swirl remaining 1 tablespoon of oil to coat. Add tortilla strips and cook for 5-7 minutes or until crispy, stirring occasionally. Or skip this step and use tortilla chips.
After Instant Pot has finished cooking, release pressure immediately or let it subside on its own. Open the lid and shred chicken with 2 forks right in the pot. Stir to combine.
Serve soup hot with tortilla strips and garnishes.
Video
Notes
Store: Refrigerate in an airtight container or right in the pot for up to 5 days. Reheat amount you will consume at that time by simmering on low heat in a pot for 5-7 minutes.
Freeze: Freeze in a glass container or resealable silicone bags leaving room for expansion for up to 3 months. Thaw in the fridge overnight or on the counter for 6 hours.
Instant Pot size: 3 quart Instant Pot half the ingredients but keep same cooking time. In 8 quart Instant Pot you can double the recipe, keep same cook time.
Sauteing tortilla strips: I tried to saute them for more flavor in my 8 quart Instant Pot and they stuck badly - I would worry about Burn. But my 6 quart, sautes better. So, if you can - saute them all in there, if not - saute garnish part on a skillet.
You can use frozen chicken: Cooking time will not change. Your Instant Pot will take a few minutes longer to come to pressure. If using a couple of chicken breasts, make sure they are separated.