This Chicken Fajita Soup is rich in flavor and clocks in under 7 net carbs per serving. Tender vegetables, a slightly spicy broth, and juicy shredded chicken make it a top pick for the season.

If you love fajitas and soup, this recipe delivers both in one bowl. Shredded chicken, vibrant veggies, and a flavorful broth combine for an easy, one-pot meal that’s fast enough for weeknights.
This soup freezes and reheats well, making it ideal for meal prep. It keeps its texture and flavor after freezing and is a great low-carb or keto-friendly option.
Ingredients
Overview of the ingredients. See the recipe card below for exact measurements.
- Olive oil – or another cooking oil you prefer.
- Vegetables – onion, bell pepper, jalapeño, garlic.
- Seasonings – chili powder, paprika, cumin, garlic powder, onion powder, salt.
- Chicken breast – lean and juicy; chicken thighs can be used instead if preferred.
- Tomatoes with green chiles – use undrained (also sold as Ro-Tel).
- Chicken broth – a good-quality broth improves the soup.
- Chipotle adobo sauce – adds smoky heat; start with a small amount and adjust to taste.
- Lime juice – begin with juice from half a lime, then taste and add more if needed.
How to make Chicken Fajita Soup
This one-pot soup has minimal hands-on time. Pre-chop the vegetables to speed up cooking on busy nights.
Sauté the vegetables
Warm a pot over medium-high heat and add the oil. Add the chopped onion, bell pepper, and jalapeño, and sauté until the vegetables are softened. Add the garlic at the end and cook briefly until fragrant—avoid browning or burning the garlic.

Add the chicken and seasonings
Lay the chicken breasts on top of the vegetables. In a small bowl, combine the dry spices and sprinkle them over the chicken so it’s evenly coated.


Add wet ingredients
Pour the undrained tomatoes and green chiles into the pot, then add the chicken broth, chipotle adobo sauce, and lime juice. Stir to combine and bring the mixture to a simmer.


Simmer and shred
Let the soup simmer for about 30 minutes so the flavors meld and the chicken cooks through. Remove the chicken and confirm it reaches 165°F (74°C) with a thermometer. Shred the chicken on a plate and return it to the pot. Stir and serve hot.

Serve
Garnish with a dollop of sour cream, extra lime wedges, chopped red onion, or fresh herbs if desired. For crunch, add crushed low-carb tortilla chips or cheese crisps. These toppings add texture without excess carbs.
Store
Cool the soup completely before transferring it to an airtight container. Store in the refrigerator for up to 4 days. For meal prep, portion into individual containers for easy reheating.


Freeze
Once cooled, transfer the soup to freezer-safe containers or flat zip-top bags. Frozen soup keeps best for up to 3 months, and it will remain safe for about 6 months. Laying bags flat saves space and makes stacking easy.
Reheat
Reheat single portions in the microwave in 30-second intervals until warmed through. For larger quantities, reheat gently on the stove over medium heat, stirring often until heated evenly.

If you like this Fajita Soup recipe, you’ll love these recipes:
- Cheesy Keto Taco Soup
- Chicken Poblano Soup
- Spicy French Onion Chicken Soup
- Crockpot Chicken Enchilada Soup
- Chicken Fajita Casserole
- Creamy Chipotle Chicken Soup


FAQs about Chicken Fajita Soup
Yes. This recipe has about 6.6 net carbs per serving, making it suitable for a keto or low-carb diet. Unlike some versions, it does not include high-carb additions like beans or corn.
Crumble baked low-carb tortillas, cheese crisps, or toasted low-carb croutons over the soup for a satisfying crunch.
Traditional fajitas feature protein (like chicken), bell peppers, onions, tomatoes, and lime. This soup recreates those core flavors in a comforting bowl.

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Chicken Fajita Soup
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Ingredients
- 2 tablespoons olive oil
- 1 cup chopped onion
- 2 cups chopped bell pepper
- 1 jalapeño, seeded and diced
- 3 garlic cloves, minced
- 1 tablespoon chili powder
- 2 teaspoons each: paprika, cumin, garlic powder, onion powder
- 1 teaspoon salt
- 2 pounds chicken breast
- 1 (10 ounce can) tomatoes with green chilis undrained
- 32 ounces chicken broth
- 1.5 tablespoon chipotle adobo sauce, link below
- 2 tablespoons lime juice *start with half a lime and taste test
Instructions
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Heat oil in a pot over medium-high heat. Add onion, bell pepper, and jalapeño; sauté until softened.
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Add garlic and the spice blend, cooking briefly until the garlic releases its aroma.
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Place chicken breasts in the pot, then add the canned tomatoes with chiles, chicken broth, chipotle adobo, and juice from half a lime. Stir and simmer for 30 minutes.
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Remove the chicken, shred it, return it to the soup, stir, and serve warm.
Notes
This recipe makes 8 servings. Each serving (about 1.25 cups) contains approximately 6.6 net carbs.