Press the Sauté button on your Instant Pot and add the chopped onion. Sauté, stirring occasionally, until the onion begins to soften, about 5 to 8 minutes.: As the pot heats you should hear a gentle sizzle when the avocado oil hits the surface, and within moments the aroma of softened onion will rise, sweet and slightly caramelized. Stir occasionally so the pieces cook evenly and don’t cling to the bottom, watching for translucent edges and glossy surfaces as your cue that they are softening. The why here is simple, sautéing develops sugars and deepens flavor which forms a richer base for the soup, and skipping this would leave the broth flatter. A common mistake is turning the heat too high which browns or burns the onion prematurely, so keep the sauté steady and adjust if you smell any sharp burnt notes.
Stir in the minced garlic, chili powder, ground cumin, paprika, dried oregano and sea salt. Allow this mixture to cook for 1 to 2 minutes to let the flavors of the spices open up.: As soon as the garlic hits the pan you’ll smell that fragrant pop, and within a minute the spices will release an inviting toasted aroma that smells warm and slightly smoky. This quick bloom of spices oils helps them integrate into the broth, creating a more dimensional flavor profile. Be careful not to let the garlic brown too long, because it will go bitter, and avoid dumping spices in all at once without stirring, which can lead to sticky clumps. The sensory cue to watch is a glossy, fragrant spice coating on the onion , not a burnt smell.
Scoot the onions off to the side and add the boneless chicken thighs to the pot. Cook for 3 minutes per side.: When you add the chicken you should hear a soft sear as it contacts the hot surface, and the meat will begin to develop a light golden exterior. This brief browning improves texture and flavor, giving the final shredded chicken extra depth. Cook for about 3 minutes per side until there is a slight color but not fully cooked through. The important why is that surface browning initiates Maillard reactions which boost savory complexity. A typical issue here is overcrowding the pot which prevents browning, so give pieces room or work in batches if needed.
Add the remaining ingredients to the pressure cooker (crushed tomatoes, diced green chilis, chicken broth, corn, and black beans).: When you pour in the crushed tomatoes and chicken broth you will see the pan deglaze, lifting browned bits from the bottom and dissolving them into the liquid, which is crucial for flavor. The aroma becomes more tomato forward with faint chile and corn sweetness, and visually the pot should look saucy and well combined. This step ensures the chicken cooks evenly in seasoned liquid. Avoid pouring too quickly and splashing the sides, and don’t forget to scrape the bottom so nothing remains stuck which can trigger a burn error on the Instant Pot.
Secure the lid on the Instant Pot, press ‘Manual’ or ‘Pressure Cook’ and set the time for 15 minutes. Make sure the pressure release valve is set to the ‘Sealing’ or closed position.: As you close the lid you will hear the latch click and feel a reassuring snugness, and setting the 15 minute high pressure timer begins the conversion of flavors under steam. The pressurized environment forces the liquid into the chicken fibers, rendering them tender and infused with spice. The why is that gentle, even pressure shortens cooking time while maximizing tenderness. A common mistake is forgetting to set the pressure valve to sealing, which will prevent proper pressurization, so check that before walking away.
The pressure cooker will take about 10-15 minutes to build the pressure, but once the pressure has built, it will go into its 15 minute high pressure cook cycle.: While it builds you may hear occasional clicks and steady warmth emanating, and the kitchen will begin to carry the scent of slow cooked tomato and spice. This warm wait allows connective tissues in the chicken to begin softening, a slow audible sigh before the real magic happens. Expect a calm, steady hum rather than loud noises; sudden hissing indicates an issue. The key pitfall is impatience, quick releasing too early can leave the chicken under tenderized.
Once the 15 minutes is over, allow the instant pot to naturally release for at least 10 minutes (ideally longer. I let mine completely release for about 40 minutes. This process generates the most tender chicken).: During natural release you may notice the aroma deepen and the broth settle into a richer sheen, and the internal juices redistribute which makes shredding easier and keeps the meat moist. The why here is texture preservation, a gentle pressure drop keeps fibers intact and prevents drying. A frequent misstep is rushing to quick release every time, which can tighten the meat and remove nuance, so give it a restful window when possible.
Release any remaining pressure using the quick release valve and open the lid of the instant pot.: When you open the valve steam will hiss out and the room will fill with the full scent of the soup, bright and savory. After the float valve drops you can open the lid and see a bubbling, fragrant pot, the surface glossy with tomato and spice. The why is to safely equalize pressure before accessing the contents. Avoid placing your face or hands over the valve while releasing steam to prevent burns.
Transfer the chicken thighs to a cutting board and use two forks to shred the chicken.: The chicken should pull apart easily, fibers separating into ribbons while releasing juicy steam and a rich meaty scent. Shredding creates texture that soaks up broth and spices, dispersing savory pockets throughout the soup. If the meat resists shredding it likely needs a few more minutes of rest or additional natural release. A mistake people make is shredding when too hot to handle, so use tongs and forks carefully or let it rest briefly.
Place the shredded chicken back into the Instant Pot and give everything a big stir. Serve immediately with fried corn strips (instructions below), fresh diced avocado, and any other toppings you like such as grated cheese or sour cream. You can serve with fresh lime wedges for a drizzle of fresh lime juice as well.: As you reintroduce the shredded chicken into the pot it will absorb the surrounding broth, and the soup becomes cohesive with threads of meat threaded through beans and corn. Stirring distributes the heat and flavors, creating uniform taste in every spoonful. The caution is stirring too vigorously which can mash beans; be gentle and ensure everything is warmed through. Watch for a glossy, integrated surface and a balanced aroma.
Stack 6 to 8 corn tortillas on a cutting board and use a sharp knife to cut them into strips that are about 1/4” to 1/2” wide.: The final presentation is sensory rich, the crunch of tortillas against tender chicken , the cool creaminess of avocado , and the salty melt of shredded cheese . Build bowls so each person can customize textures and heat. A common error is adding toppings too early which lose their freshness, so serve them on the side when possible so each bite retains contrast.
Heat 1/4 cup of high temperature cooking oil (I use avocado oil) in a large nonstick skillet over medium-high heat. Once the oil is sizzling hot, carefully add 4 to 6 strips of corn tortillas at a time to the oil. Cook for 2 to 3 minutes per side or until the strips are golden brown and have reached your desired level of crisp.: When you slice the tortillas the edges should be clean and even, and the thin strips create the ideal surface area for frying to crispness. Using a sharp knife ensures neat strips which fry uniformly, producing consistent golden color. The why is even thickness for predictable cooking; uneven strips will brown unevenly. Take care cutting away from your hand to avoid injury.
Transfer the crispy tortilla strips to a paper towel-lined plate and repeat for the remaining tortilla strips. For the best result, serve immediately on top of chicken tortilla soup with any additional toppings.: As the oil shimmers and starts to ripple you know it is ready, and when a single test strip sizzles on contact you have the right temperature. Add a few strips at a time so the oil temperature remains stable, and fry until the strips are golden and crisp, about 2 to 3 minutes per side. The sensory cues are steady sizzling and a warm, toasty corn smell. Overcrowding will drop the oil temperature and make limp strips, so work in batches.
Transfer the crispy tortilla strips to a paper towel-lined plate and repeat for the remaining tortilla strips: Draining on paper towels will remove excess oil and keep them crisp, with the aroma of warm fried corn and a satisfying fragile crunch. Repeat until all strips are golden, then use them to top bowls immediately for peak texture. A common mistake is leaving fried strips in the hot pan which continues to brown them, so move them promptly to the towel lined plate.