Slow Cooker Chicken Fajitas Recipe
Introduction
Slow Cooker Chicken Fajitas are an effortless and flavorful meal perfect for busy days. Tender chicken breasts simmer with a colorful mix of peppers and onions, seasoned with a homemade blend of fajita spices. This recipe allows the slow cooker to do all the work, delivering a delicious Tex-Mex dinner with minimal prep.

Ingredients
- 650 g (1.5 lb) Chicken breast
- 1 Red pepper (capsicum), deseeded and cut into wedges
- 1 Yellow pepper (capsicum), deseeded and cut into wedges
- 1 Green pepper (capsicum), deseeded and cut into wedges
- 2 Large onions, peeled and cut into wedges
- 2 tsp Oil
- For the fajitas seasoning (or use 4 tbsp of ready-made fajita seasoning):
- 1 tsp Chilli powder
- 1 tsp Ground cumin
- 2 tsp Paprika
- 1/4 tsp Cayenne pepper
- 1/2 tsp Garlic powder
- 1 tsp Sea salt
- 1 tsp Ground black pepper
Instructions
- Step 1: Place the chicken breasts, all the cut peppers, onions, oil, and fajita seasoning into the slow cooker. Stir gently to combine.
- Step 2: Cook on HIGH for 3 hours or LOW for 5 to 6 hours, until the chicken is fully cooked through.
- Step 3: Check the chicken for doneness before serving. Remove it from the slow cooker, slice it, then return it to the peppers and onions.
- Step 4: If desired, drain some of the cooking liquid to avoid a soggy texture and strong seasoning taste.
- Optional: For firmer peppers with more texture, add the peppers to the slow cooker 30 minutes before the end of the cooking time instead of at the start.
Tips & Variations
- Use ready-made fajita seasoning to save time without compromising flavor.
- Add a squeeze of fresh lime juice just before serving for a bright, fresh twist.
- Serve with warm tortillas, salsa, sour cream, and guacamole for a complete meal.
- Swap chicken breasts for thighs if you prefer juicier meat.
Storage
Store leftover fajitas in an airtight container in the refrigerator for up to 3 days. Reheat gently in a pan or microwave until warmed through. Avoid reheating multiple times to maintain texture and flavor.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use frozen chicken breasts in this recipe?
It is best to use thawed chicken breasts to ensure even cooking and accurate cooking times. Using frozen chicken may result in uneven cooking and is not recommended in a slow cooker.
How can I make the fajitas less spicy?
Reduce or omit the cayenne pepper and chili powder in the seasoning mix. You can also serve with cooling toppings like sour cream or guacamole to balance the heat.
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Slow Cooker Chicken Fajitas Recipe
- Total Time: 3 hours 15 minutes (HIGH) or 5 hours 15 minutes to 6 hours 15 minutes (LOW)
- Yield: 4 servings 1x
Description
This Slow Cooker Chicken Fajitas recipe is a flavorful and effortless way to enjoy tender chicken breasts cooked alongside crunchy bell peppers and onions, all infused with a smoky fajita seasoning blend. Perfect for a hands-off meal, the slow cooker does the work, resulting in juicy, well-seasoned fajita filling that can be served with tortillas and your favorite toppings for a delightful Tex-Mex dinner.
Ingredients
Chicken and Vegetables
- 650 g (1.5 lb) Chicken breast
- 1 Red pepper (capsicum), deseeded and cut into wedges
- 1 Yellow pepper (capsicum), deseeded and cut into wedges
- 1 Green pepper (capsicum), deseeded and cut into wedges
- 2 Large onions, peeled and cut into wedges
- 2 tsp Oil
Fajitas Seasoning
- 1 tsp Chili powder
- 1 tsp Ground cumin
- 2 tsp Paprika
- 1/4 tsp Cayenne pepper
- 1/2 tsp Garlic powder
- 1 tsp Sea salt
- 1 tsp Ground black pepper
Instructions
- Prepare ingredients: Deseed and cut the red, yellow, and green peppers into wedges. Peel and cut the onions into wedges. Measure out the oil and all the spices for the fajita seasoning.
- Add to slow cooker: Place the chicken breasts, all the prepared peppers, onions, oil, and the fajita seasoning (or 4 tbsp ready-made fajita seasoning if preferred) into the slow cooker. Mix gently to combine.
- Cook the fajitas: Cook on HIGH for 3 hours or LOW for 5-6 hours. This slow cooking will tenderize the chicken and allow the flavors from the seasoning and vegetables to meld beautifully.
- Check doneness: Ensure the chicken is cooked through before serving. Use a knife to check that the thickest part of the chicken is no longer pink inside.
- Slice chicken and mix: Remove the chicken breasts, slice them, and then add the slices back into the slow cooker with the peppers and onions. Stir to combine.
- Adjust liquid (optional): You may want to drain off some of the cooking liquid if it’s too strong in seasoning flavor or makes the mixture too wet for your liking.
- Optional texture adjustment: For peppers with a firmer texture, add the peppers 30 minutes before the cooking time ends rather than at the start, to avoid very soft vegetables.
Notes
- Chicken breast sizes vary; always verify chicken is fully cooked before serving.
- Draining excess liquid after cooking can prevent the mixture from becoming too wet.
- Adding peppers late in cooking keeps them slightly crunchy if preferred over very soft.
- This recipe is versatile and works well with ready-made fajita seasoning for convenience.
- Prep Time: 15 minutes
- Cook Time: 3 hours (HIGH) or 5-6 hours (LOW)
- Category: Main Dish
- Method: Slow Cooking
- Cuisine: Tex-Mex
Keywords: slow cooker chicken fajitas, fajitas recipe, slow cooker dinner, easy chicken fajitas, Tex-Mex

