These easy crockpot chicken fajitas are as close to a hands-off dinner as it gets. Chicken breasts, sliced bell peppers, onion, and a packet of fajita seasoning go into the slow cooker, and a few hours later you have juicy, shreddable chicken ready for warm tortillas. There is no skillet, no sizzling, and almost no prep.
The recipe is built for busy days. You can load the crockpot in 15 minutes, go about your day, and come home to a house that smells like a taqueria. Set out tortillas and toppings, and everyone can build their own fajita for a simple, fun family dinner.
Table of Contents
Why This Works
The slow cooker traps moisture, so the chicken breasts cook gently and stay tender. The peppers and onion release juices as they soften, and those juices mix with the seasoning to make a flavorful sauce that coats the shredded chicken.
The biggest mistake with chicken fajitas in a slow cooker is cooking them too long. Lean breast meat is done well before the old 6 to 8 hour estimate, and it turns dry and stringy if it keeps going. Cooking on low for about 4 to 5 hours, or on high for 2 to 3 hours, gives tender chicken that shreds easily without drying out. Slow cookers vary, so a thermometer is the best guide.
Ingredients
- 2 pounds boneless skinless chicken breasts
- 1 red bell pepper, sliced
- 1 green bell pepper, sliced
- 1 medium onion, sliced
- 1 packet (1 ounce) fajita seasoning
- 1 can (14.5 ounces) diced tomatoes, drained, optional
- Salt and pepper, to taste
- 12 small flour tortillas (6 inch), warmed
- Sour cream, shredded cheese, and avocado, for serving, optional
How to Make Easy Crockpot Chicken Fajitas
1. Add the chicken.
Place the chicken breasts in the bottom of the slow cooker in a flat, even layer.
2. Add the vegetables.
Scatter the sliced red and green bell peppers and the onion on top of the chicken.
3. Season.
Sprinkle the fajita seasoning over everything. If you are using diced tomatoes, spoon them over the top after the seasoning, then add salt and pepper to taste.
4. Cook.
Cover and cook on low for 4 to 5 hours, or on high for 2 to 3 hours, until the chicken reaches 165 degrees F in the thickest part and shreds easily. Check it near the early end of the range so it does not overcook.
5. Shred and mix.
Use two forks to shred the chicken right in the slow cooker, then stir it into the peppers, onion, and juices.
6. Serve.
Use a slotted spoon to scoop the filling into warm tortillas, and add your favorite toppings.
How to Serve
Set up a fajita bar with warm tortillas, sour cream, cheese, and sliced avocado. If you want to make the tortillas from scratch, try these easy flour tortillas from scratch. A scoop of authentic guacamole and a bowl of homemade corn salsa add freshness, and easy Mexican rice turns the fajitas into a full dinner.
The filling is also good over rice, in a burrito bowl, or in a quesadilla the next day.
How to Store and Reheat
Refrigerate leftover fajita filling in an airtight container within two hours of cooking. It keeps for up to 3 days in the refrigerator. Reheat it in a skillet or in the microwave until it is steaming hot, adding a spoonful of the cooking juices to keep the chicken moist. Do not reheat leftovers in the slow cooker itself, since it heats food too slowly. Move them to the stove or microwave instead.
Tips and Variations
Always check the chicken with a thermometer. The University of New Hampshire Extension slow cooker fajita recipe calls for inserting a food thermometer in the center of the chicken and making sure it reaches at least 165 degrees F before serving.
Do not add extra liquid. The chicken and vegetables release plenty of juices, and too much liquid will water down the seasoning. If the filling looks soupy at the end, lift the chicken and vegetables out with a slotted spoon.
For more flavor, add a squeeze of fresh lime at the end, or stir in a little chili powder or cumin along with the seasoning packet. Sliced mushrooms or zucchini also work well. For a spicier version, add a diced jalapeno with the peppers.
FAQ
How long do chicken fajitas take in a crockpot?
Boneless chicken breasts usually take about 4 to 5 hours on low or 2 to 3 hours on high. The exact time depends on your slow cooker and the thickness of the chicken, so test it with a thermometer.
Can I use chicken thighs?
Yes. Thighs are more forgiving and stay juicy if they cook a little longer. Check that they reach 165 degrees F before shredding.
Do I need to thaw the chicken first?
Yes. Thaw the chicken completely in the refrigerator before it goes in the slow cooker so it cooks evenly and reaches a safe temperature in time.
Can I use fresh seasoning instead of a packet?
Yes. Mix chili powder, cumin, garlic powder, paprika, onion powder, and salt for a homemade blend. Use about the same amount as a one-ounce packet and adjust to taste.
Can I freeze the fajita filling?
Yes. Cool the filling quickly, then freeze it in an airtight container or freezer bag. Thaw it in the refrigerator and reheat until steaming hot. The peppers will be softer after freezing, but the flavor holds up well.
Easy Crockpot Chicken Fajitas with Peppers and Onions
Ingredients
Main Ingredients
- 2 lb boneless skinless chicken breasts
- 1 red bell pepper sliced
- 1 green bell pepper sliced
- 1 medium onion sliced
- 1 packet (1 oz) fajita seasoning
- 1 can (14.5 oz) diced tomatoes drained, optional
- salt and pepper to taste
- 12 small flour tortillas (6 inch) warmed
- sour cream, shredded cheese, and avocado for serving, optional
Instructions
Cooking
- Place the chicken breasts in a flat layer in the slow cooker.
- Scatter the sliced peppers and onion over the chicken.
- Sprinkle the fajita seasoning over everything, add the diced tomatoes if using, and season with salt and pepper.
- Cover and cook on low for 4 to 5 hours, or on high for 2 to 3 hours, until the chicken reaches 165 degrees F and shreds easily.
- Shred the chicken with two forks and stir it into the peppers, onion, and juices.
- Serve the filling in warm tortillas with your favorite toppings.
