JUMP TO RECIPE ↓

Recipe

Print recipe ⎙Cook mode ↗

Serves

6 1×

−+Reset

0.5×1×2×

Serves 6Prep 15 minCook 4H30 minTotal 9H30 min

Ingredients

• 1½ pounds boneless, skinless chicken breasts or thighs
• 2 medium bell peppers, thinly sliced
• 1 large yellow onion, thinly sliced
• 2 medium tomatoes, diced
• 3 garlic cloves, finely minced
• 2 tablespoons fresh lime juice, divided
• 1 tablespoon olive oil
• 2 teaspoons chilli powder
• 1½ teaspoons ground cumin
• 1 teaspoon smoked paprika
• 1 teaspoon dried oregano
• 1 teaspoon salt
• ½ teaspoon black pepper
• ½ cup chicken stock
• 8–12 small flour tortillas, for serving

Method

1. Prepare the vegetables. Slice the peppers and onion into thin, even strips. Dice the tomatoes and mince the garlic.
2. Make the seasoning. In a small bowl, combine the chilli powder, cumin, smoked paprika, oregano, salt and black pepper.
3. Layer the slow cooker. Pour the chicken stock into the slow cooker. Add the sliced onion, peppers, tomatoes and garlic.
4. Add the chicken. Place the thawed chicken breasts or thighs on top of the vegetables. Drizzle with the olive oil and sprinkle evenly with the seasoning mixture.
5. Cook. Cover with the lid and cook on LOW for 4–5 hours or HIGH for 2–3 hours. Avoid lifting the lid during cooking unless necessary.
6. Check the temperature. Insert an instant-read thermometer into the thickest part of the chicken. It should register at least 165°F (74°C).
7. Shred or slice. Transfer the cooked chicken to a plate. Shred it with two forks or slice it into strips. Return the chicken to the slow cooker and stir it through the vegetables and cooking juices.
8. Finish with lime. Stir in 1 tablespoon of lime juice. Taste and adjust the salt or add the remaining lime juice if needed.
9. Warm the tortillas. Heat the tortillas in a dry frying pan, microwave or oven according to the packet instructions.
10. Serve. Spoon the chicken fajita mixture into warm tortillas. Add avocado, coriander, sour cream, cheese, salsa, lime and any other desired toppings.

Slow Cooker Chicken Fajitas (Easy Set & Forget)

These slow cooker chicken fajitas are a practical weeknight dinner made with tender chicken, colourful peppers, onions, tomatoes and a simple fajita seasoning blend. The slow cooker does most of the work, so there is no need to stand over a hot pan or cook several separate ingredients.

Add the chicken and vegetables to the slow cooker, season everything well, then cook until the chicken is tender and fully cooked. Shred or slice the chicken before serving it in warm flour tortillas with your preferred toppings.

This recipe works well for family dinners, meal preparation and casual entertaining. Serve the filling with tortillas, rice, salad or baked potatoes.

JUMP TO RECIPE

Why this recipe works

Slow cooking allows the chicken to absorb the seasoning while the peppers and onions become soft without requiring constant attention. The tomatoes provide moisture and balance the smoky spices, while lime juice added at the end brightens the finished filling.

For the best texture, use boneless, skinless chicken breasts or thighs. Chicken thighs are more forgiving and remain particularly juicy, while chicken breasts provide a leaner result. Use thawed chicken rather than frozen chicken. The USDA slow-cooker food-safety guidance recommends thawing meat before adding it to a slow cooker.

Check the thickest part of the chicken with an instant-read thermometer. Poultry should reach 165°F (74°C) before serving.

Tips for the best slow cooker fajitas

• Do not use frozen chicken. Thaw it safely in the refrigerator before cooking.
• Keep the lid closed. Removing the lid releases heat and can extend the cooking time.
• Slice the vegetables evenly. Similar-sized pieces cook at the same rate.
• Do not add too much liquid. The chicken, tomatoes and vegetables release moisture as they cook.
• Use chicken thighs for extra tenderness. They are less likely to dry out during longer cooking.
• Add lime at the end. Fresh lime juice tastes brighter when it is not cooked for several hours.
• Season after shredding. The cooking juices can dilute the seasoning slightly, so taste the finished filling before serving.
• Keep leftovers safely. Refrigerate leftovers promptly in a covered container. Reheat them on the hob, in the oven or in the microwave until piping hot. Do not use a slow cooker to reheat cold leftovers.

For food safety, hot food should be held at 140°F (60°C) or above, and leftovers should be reheated to 165°F (74°C). Refer to FoodSafety.gov guidance on keeping food warm for additional information.

Variations

Chicken fajita bowls

Serve the cooked chicken and vegetables over rice, quinoa or cauliflower rice. Add black beans, corn, avocado and salsa for a complete bowl.

Creamy chicken fajitas

Stir 3 tablespoons of cream cheese or sour cream through the hot chicken mixture just before serving. The result will be richer and milder.

Spicy fajitas

Add one sliced jalapeño to the slow cooker or increase the chilli powder. A pinch of cayenne will add more heat without changing the texture.

Lower-carbohydrate fajitas

Replace the tortillas with lettuce cups or serve the chicken over cauliflower rice. Add avocado and a spoonful of Greek yoghurt.

Chicken and black bean fajitas

Add one drained and rinsed can of black beans during the final 20–30 minutes of cooking. This increases the volume of the filling and adds fibre.

Cheesy fajitas

Place the finished chicken mixture in an ovenproof dish, top with grated cheese and bake until the cheese melts. Serve with tortilla chips or warm tortillas.

FAQ

Can I use chicken thighs instead of chicken breasts?

Yes. Boneless, skinless chicken thighs work well and usually produce a more tender result. Cook them using the same LOW or HIGH settings, then confirm that the thickest pieces reach 165°F (74°C).

Can I put raw chicken in the slow cooker?

Yes, provided the chicken is fully thawed and the slow cooker is operating correctly. Arrange the chicken in an even layer and cook until it reaches the safe internal temperature of 165°F (74°C).

Can I use frozen chicken?

No. Thaw the chicken in the refrigerator before adding it to the slow cooker. Frozen chicken can remain at an unsafe temperature for too long while the slow cooker gradually heats.

How do I stop the fajita filling from becoming watery?

Use only the stated amount of stock, avoid adding extra water and make sure the tomatoes are not excessively large or watery. If the finished mixture contains too much liquid, remove the chicken and simmer the vegetables and cooking juices in a saucepan until slightly reduced.

Can I prepare the ingredients the night before?

You can slice the vegetables and mix the seasoning in advance. Store them in separate covered containers in the refrigerator. Keep the raw chicken refrigerated and add it to the slow cooker immediately before cooking.

How long do slow cooker chicken fajitas keep?

Store leftovers in the refrigerator for up to 3–4 days in a sealed container. Reheat thoroughly to 165°F (74°C) before serving. Leftovers can also be frozen for up to 3 months, although the peppers may be softer after thawing.

Can I make this recipe without tortillas?

Yes. Serve the filling over rice, in lettuce cups, with a side salad or alongside roasted potatoes. It can also be used as a filling for quesadillas.