1. Sear the chicken for deep flavor

Start by placing a large, heavy soup pot or Dutch oven over medium high heat and let it preheat so the oil and pan come to temperature together for a good sear. Add about 1 tablespoon of olive oil, swirl to coat the bottom, then lay in the chicken breasts in a single layer and season lightly with salt and pepper so the surface develops a flavorful crust.

Allow the chicken to cook undisturbed on the first side until it develops a golden color, then flip and sear the second side again just until browned, not fully cooked through. This step builds a savory base for the soup, so resist the urge to move the chicken around too much; once both sides have color, remove the chicken to a plate and keep it aside while the vegetables start cooking.

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2. Soften the aromatic vegetables

Add the remaining tablespoon of olive oil to the same pot, keeping all the browned bits at the bottom because they will enrich the broth. Tip in the diced onion, carrots and celery, season with a small pinch of salt, then reduce the heat to medium and cook, stirring occasionally, until the vegetables soften and the onions turn slightly translucent.

This gentle sauté usually takes several minutes and helps release the natural sweetness of the vegetables so the soup tastes full and comforting without needing a lot of extra ingredients. Make sure the heat is not too high; the vegetables should soften and lightly sauté rather than brown aggressively, which keeps the flavor balanced for a lighter soup.

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3. Build the Tex Mex broth

Once the vegetables are tender, return the seared chicken breasts and any accumulated juices back into the pot so none of that flavor is lost. Pour in the chicken stock along with the salsa, letting the tomatoes, peppers and aromatics from the salsa blend into the broth. Stir in the chili powder, ground cumin and dried oregano, making sure the spices disperse evenly through the liquid.

Bring the pot up to a steady boil, then immediately lower the heat to low so the soup settles into a gentle simmer that will cook the chicken slowly. This low simmer allows the meat fibers to relax and turn tender while the salsa and spices infuse the broth, creating a soup that tastes rich yet remains pleasantly light.

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4. Simmer until the chicken falls apart

Let the soup simmer on low heat for about 1 to 1 1/2 hours, checking occasionally to be sure it stays at a gentle bubble rather than a vigorous boil. Over this time the chicken will gradually become very tender and will eventually reach the point where it easily falls apart when pressed with a fork.

When the chicken is ready, carefully lift the breasts out onto a plate or board and let them cool just enough to handle. Keep the pot of broth and vegetables on low heat during this time so the flavors continue to meld without reducing too aggressively.

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5. Shred the chicken and enrich the soup

Using two forks, shred the chicken into bite sized pieces, discarding any bits of fat or gristle so the texture stays clean and pleasant in every spoonful. Aim for rustic shreds rather than very fine strands so the meat still feels substantial when you eat the soup.

Return all the shredded chicken to the pot, stir it through the broth and increase the heat to medium to bring the mixture back up to a gentle boil. At this stage, taste the broth and adjust salt if needed to balance the warmth of the spices and the tang from the salsa.

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6. Cook the noodles until just tender

Once the soup is boiling again, add the egg noodles directly into the pot, stirring so they do not clump together as they begin to cook. Follow the cooking time on the noodle package, simmering the soup until the noodles are just tender yet still hold their shape well.

As the noodles cook, they absorb some of the flavorful broth which makes each bite taste seasoned from the inside. Keep the heat at a moderate simmer during this stage and stir occasionally so the noodles cook evenly and the shredded chicken stays suspended throughout the soup.

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7. Finish with fresh toppings and serve

When the noodles are done, taste the soup one more time and adjust the seasoning so the salt level complements the spice and acidity without overpowering the delicate broth. Ladle the hot soup into bowls, making sure each serving gets a generous amount of noodles, chicken and vegetables.

Top each bowl with diced avocado, a sprinkle of fresh cilantro and a squeeze of lime to add a bright, fresh contrast to the warm, spiced base. The creaminess of the avocado, the herbaceous cilantro and the citrusy lime lift the dish and give it the characteristic Tex Mex edge that keeps the soup feeling lively instead of heavy.