Slow Cooker Chicken Fajita Soup

A fun twist on a Tex-Mex favorite! This slow cooker chicken fajita soup makes a meal just spicy enough for everyone to enjoy. Your favorite fajitas are now available in a soul warming Mexican soup.


Everything you love about fajitas made into a healthy Slow Cooker Chicken Fajita Soup. The base is low carb and keto friendly but you can always add beans, corn, or rice if you want a heartier soup. A great alternative to these traditional Baked Chicken Fajitas or One Pan Shrimp Fajitas.

Once it starts to get cold, I immediately start to think about soup recipes, cuddling up on the couch, and cozy winter clothes. Now sometimes that's hard to do in Los Angeles since it's been over ninety all week, but that doesn't stop me from cranking up the air conditioner and pretending I'm back East. My newest remedy to cure my warm winter blues is a crockpot chicken fajita soup.

I always love the idea of using main dish recipes to inspire soups and stews and today's slow cooker chicken fajita soup recipe is no different. All the classic chicken fajita ingredients in a delicious, slightly spicy tomato chicken broth. Black beans, pinto beans, or rice are all welcome additions to the soup as well. And don't skimp out on the toppings. Bring on the cheddar cheese, avocado, pico de gallo, and sour cream.

So, the next time you are in the mood for fajitas or soup, try combining the two into a delicious fajita soup. The smell of the chicken, peppers, and tomatoes along with cumin, chili powder, and paprika will make you think you are about to bite into true fajitas. The beauty of slow cooker chicken fajita soup is that you can add all the toppings you desire, choose to freeze it for later without losing quality as you would with fajitas, and you don’t have to leave your home to cure your fajita craving. This recipe will quickly become your new favorite Mexican soup. If you haven’t purchased a crockpot just yet, you’ll want to get one so you can experience this crockpot chicken fajita soup for yourself!

Fajita soup in a bowl with shredded cheese, peppers, onions, and chicken.

Customizing Fajita Soup

Do you prefer steak fajitas instead? How about shrimp? This recipe goes great with these proteins as well. Just remember that these two proteins are cooked to different temperatures so you may need to adjust the cook time slightly. For the slow cooker, you can use lean beef stewing meat, just adjust the cooking time to 8 hours. If you are using shrimp, cook it on the side and add it right before serving.

Are there vegetables in this recipe that you do not care for? Add or remove your favorite vegetables to make this recipe geared towards your own taste. Do you or your guests prefer less spice? Feel free to remove or reduce the jalapenos and cut down on some of the spicier seasonings. But not too much, you don’t want to risk losing that traditional fajita flavor!

Want to make it lower calorie or lower points? Make it with chicken breast instead! It will be just 1 WW Freestyle points. The only change you need to make is to the cooking time. Chicken breast usually only takes about 3 hours in the slow cooker and cooking it longer can cause the chicken to dry out.

Plan Ahead

You know your schedule is tight this week but you want to avoid eating out again? Plan ahead to make this fajita soup recipe instead! Here are a few tips to make the process even easier.

  • Pre-cut all the vegetables. You can even cut and freeze these items in bulk to use in other recipes.
  • Measure and mix all spices together for later use. If you plan to make this recipe multiple times why not go ahead and measure out enough for a few servings?
  • Make the whole soup in advance. Soup only gets better after a couple of days in the fridge, so you can prep this entire meal in advance.

Serving Ideas

Fajitas are traditionally served with tortillas, beans, rice, and sides like sour cream, guacamole, lettuce, and tomato. You can continue to use these favorites with this soup. Or you can throw in your own preferred toppings. Crunchy baked tortilla strips add an appetizing texture to this soup and like chili, it's fun to pile on the toppings. The next time you might have Mexican night or a taco bar at your gathering offer this soup to your guests instead. They will be pleasantly surprised and excited for a change from the normal.

Crockpot fajita soup with a lime and fresh cilantro.

Side Dishes for Crockpot Fajita Soup

Soups are special because they can be served with or without a side dish and still be filling and appetizing. This fajita soup is no different. You can also take the traditional soup and salad or soup and sandwich route. But make it fun and keep to the Mexican meal track. Serve with tacos, a side of rice or beans, or a Mexican inspired salad like this one. For a heartier meal, sometiems I  pour my soup over rice or beans. It adds a heartier texture to the meal.

Health Benefits of Slow Cooker Chicken Fajita Soup

The only thing that could make this recipe any better is knowing all the health benefits from the amazing ingredients. The low fat chicken and low sodium broth aren’t the only two health-conscious ingredients you’ll find in this crock pot chicken fajita soup! Red peppers are high in immune boosting vitamin C, are an excellent source of folate and B6, and are rich in antioxidants. All those benefits from just one ingredient! Mushrooms are another ingredient in this recipe that are also high in antioxidants, selenium to be exact. Antioxidants are a powerful way to fight and prevent disease.

The Recipe
Slow Cooker Chicken Fajita Soup in a bowl with cilantro and lime.

Slow Cooker Chicken Fajita Soup

COOK TIME: 4 Hours
TOTAL TIME: 4 Hours, 10 Min
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  • 2 tbsp. olive oil
  • 2 lbs. boneless skinless chicken thighs
  • 32 oz. low sodium chicken broth
  • 14 oz. canned fire roasted diced tomatoes
  • 2 red peppers, diced
  • 2 green peppers, diced
  • 1 onion, sliced thin
  • 2 cups mushrooms, sliced or halved
  • 3 garlic cloves, minced
  • 1 jalapeno, seeded and minced
  • 2 tsp. cumin
  • 1.5 tsp. chili powder
  • 1 tsp. paprika
  • 1 tsp. oregano
  • 1/2 tsp. coriander
  • Salt and pepper

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Add everything to the slow cooker. Cook on low for 6 hours. Shred chicken with 2 forks.


Serve with fresh lime juice, cilantro, cheese, and/or sliced avocado.

Nutritional Facts
Serving Size: 1.5 cups
Amount Per Serving
Calories 305
Calories from Fat 54
% Daily Value *
Total Fat 11g
Saturated Fat 2g
Monounsaturated Fat 2g
Polyunsaturated Fat 1g
Cholesterol 132mg
Sodium 449mg
Total Carbohydrate 14g
Dietary Fiber 3g
Sugars 6g
Protein 34g

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Nutritional Values provided are estimates only and may vary based on the preparation method.

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About the authorMeet Kristen McCaffrey
Hi, I’m the cookbook author, recipe developer, and food enthusiast behind Slender Kitchen. I am obsessed with making healthy food that is easy to prepare and absolutely delicious. Meal planning is my secret weapon and I hope I can make meal time easier for you with our tried and tested recipes and foolproof meal plans. Learn More
On Slow Cooker Chicken Fajita Soup
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Beverly Morlan
December 20, 2018 - 10:14
What is the olive oil for that adds 1 point of those 5 sp? Just curious. This sounds very good but I will do it with chicken breast.
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December 20, 2018 - 18:44
You can defintiely leave it out and make this a zero point soup :) It adds some richness to the broth but isn't 100% neccessary.
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