Crock Pot Chicken Fajitas

Crock pot chicken fajitas have been a favorite for a while now, and I have to say, it’s very well deserved. It’s unbelievably easy. Just throw everything into the slow cooker when you leave for work, and then come home after a long day to warm up some tortillas to go with your tender, juicy chicken. You don’t have to stand at the stove, constantly checking the time, and you definitely won’t have to deal with any dry chicken breast. Recipes like this one only improve with time, so don’t worry about how long you wait to make them!

The slow cooker will not give you that beautiful crisp char you would get from a cast iron skillet or grilling your chicken. What it will give you, however, is that incredibly delicious, super juicy chicken that is literally falling apart! Not to mention, it will soak up of all your delicious seasoning. If you want to add your own nice char, you can always finish it off with a quick two-minute broil.

Why This Slow Cooker Recipe Works

The biggest caveat to cooking chicken breast meat in a slow cooker is that you need to be careful managing the moisture that builds up during cooking. If you are not careful, the end result can be a boggy pepper and onion mix that will literally make your taco shells, or whatever you plan to use, soggy before the meal is served. This recipe utilizes a method that is designed to avoid that scenario. The bell peppers and onions are put on the bottom. Since they release more water than the chicken does, they create a steaming environment for the chicken to cook, and not a watery environment.

The seasoning mix is stuck on the chicken for the whole cook time because it is put on before it goes in, so it doesn’t wash off into the liquid. And salsa — not canned tomatoes, not broth — is the liquid here because it adds body, acidity, and built-in seasoning all at once. There is a reason this combination keeps showing up on dinner tables: it works.

If you have a quality slow cooker, you will notice the difference in quality. If your crock pot is an older model, you will notice it often runs hotter. If this is the case, check the chicken after 3.5 hours, instead of the full four hours. Overcooking chicken in a slow cooker is not going to be dry, instead it will be stringy in a way that is unpleasing. It is worth every penny. If you are not home to check on it, a programmable slow cooker with a warm setting will do the trick. Once the time is up on the cooking, it will automatically switch to the warm setting to take the stress off you.

What You Need to Know Before You Start

A few tips to avoid the most common mistakes when making fajitas in a slow cooker:

Chicken Breasts vs. Chicken Thighs

Although both options work, there are differences in how each one behaves. Chicken breasts are shreddable and have a cleaner appearance. They’re what most people picture when they imagine fajitas. If your slow cooker happens to run hot, chicken thighs are more forgiving since they will stay juicy even if you go a little too long. Make sure to use boneless and skinless pieces so you don’t have to deal with the bones or extra fat at the end.

Bell Pepper Color

You can use any color bell pepper, but there is a real taste difference. Green bell peppers have a sharper and slightly more bitter taste. Some people love that flavor contrast with the chicken. Red, yellow, and orange peppers are sweeter, and become even more mellow as they cook down. For color and flavor, I like a combination of red and green peppers, but that is purely a matter of personal taste.

The Liquid Amount Matters

No need to add water or broth. The chicken and veggies let out plenty of moisture while cooking and the salsa provides all the liquid you will need. Extra liquid will turn this into soup, not fajita filling. Stick to the ½ cup of salsa and trust the process.

Cook Time Windows

On low, that’s about 4 to 5 hours. On high, about 2 to 3 hours. Thicker chicken breasts require more time, while thinner ones require less. And if you’re cooking from frozen, add 1 to 1.5 hours on low. You want to check with a meat thermometer — the chicken should be at 165°F internal temperature.

Ingredients

These are the ingredients you’ll need to serve 4 to 6 people:

For the Fajita Filling

• 2 lbs boneless skinless chicken breasts (about 3–4 medium)
• 3 bell peppers, sliced (any color combination — I use 2 red, 1 green)
• 1 large yellow onion, sliced into half-rings
• ½ cup salsa (use your favorite jarred variety or homemade)
• 3 tablespoons fajita seasoning (store-bought packet or homemade — recipe below)
• 2 tablespoons olive oil
• Juice of 1 lime
• 3 garlic cloves, minced
• 1 teaspoon salt (reduce if your seasoning blend is already salty)

Homemade Fajita Seasoning (optional, makes about 3 tablespoons)

• 1 tablespoon chili powder
• 1 teaspoon cumin
• 1 teaspoon smoked paprika
• ½ teaspoon garlic powder
• ½ teaspoon onion powder
• ½ teaspoon oregano
• ¼ teaspoon cayenne (optional, for heat)
• ¼ teaspoon black pepper

Store bought blends are always good when you make your own seasoning blends. If you are adding salsa then you may want to control the amount of salt added.

For Serving

• 8–10 flour tortillas (6-inch or 8-inch, depending on how loaded you like them)
• Shredded Mexican cheese blend
• Sour cream
• Guacamole or sliced avocado
• Fresh cilantro
• Lime wedges
• Pico de gallo or extra salsa
• Jalapeño slices (optional)

How to Make Crock Pot Chicken Fajitas

Step 1: Layer the Vegetables

Put the chopped bell peppers and onions into your slow cooker. Drizzle with 1 tablespoon of olive oil and toss to coat. If you spread them out in an even layer, they will cook more evenly, and they will also give the chicken something to rest on instead of sitting directly on the crock surface.

Step 2: Season the Chicken

In a separate small bowl, whisk together the fajita seasoning, another tablespoon of olive oil, minced garlic, and lime juice to create a loose paste. Coat the chicken breasts on all sides with the seasoning mixture. Take as much time as you need. A good coating will mean that all sides, not just the surface, have coating and seasoning.

Step 3: Add Chicken and Salsa

Lay the seasoned chicken on the veggies. Then, add the salsa on top of everything. Cover the pot and try not to lift the lid during the cook time. Each time you lift it, you add about 20 minutes to the total cook time.

Step 4: Cook

In the thickest part of the chicken, you want it to reach 165°F so it can be easily shredded with two forks. If it’s pulling apart, but still appears very wet, remove the lid during the last 20 minutes to let some moisture escape.

Step 5: Shred and Mix

Take the chicken out of the slow cooker and put it on a cutting board. Use a pair of forks to shred the chicken. Place the chicken back in the slow cooker and mix it all together. The chicken will soak up a lot of the cooking liquid and seasoning while it sits. At this stage, season to taste with salt and lime juice.

Step 6 (Optional): Broil for Texture

To achieve some caramelization and a bit of texture with the peppers and chicken, if desired, spread the filling out on a baking sheet covered with foil and broil it for 3-5 minutes. Keep a close eye on it — you want some nice browning, but you don’t want to let it get charred. An excellent option for this is also a cast-iron skillet — preheat it until it is very hot, and then work the filling in batches to get that super quick sear for 1-2 minutes. Either of these methods changes the slow cooker version from good to truly restaurant-quality.

Step 7: Warm the Tortillas and Serve

You can heat your tortillas directly over a gas flame for about 30 seconds on each side, use a dry skillet, or heat them wrapped in a damp paper towel in the microwave for 30 seconds. Cold tortillas crack when they are folded, whereas warm tortillas are flexible and taste better. Load them up with your filling and toppings.

Tips for the Best Slow Cooker Chicken Fajitas

Don’t Skip the Lime

Lime juice does a couple of things: it brightens the overall flavor and also acts as an emulsifier to help the seasoning stick to the chicken. While bottled lime juice works in a pinch, a fresh lime has much better flavor. Juices from fresh limes should be eaten almost immediately after squeezing. Lime juice oxidizes quickly and lose its punch after a few hours.

Slice the Peppers and Onions Thicker Than You Think

Thin slices will turn to mush after 4+ hours in the slow cooker. Aim for cuts around ½-inch thick. While the slices will still soften considerably, they will retain enough of their structure to give the filling genuine texture rather than an homogeneous, mushy mass.

Make It Spicier (or Milder)

If you want more heat, try using a hotter salsa, add 1/4 to 1/2 teaspoon of cayenne to your seasonings, or toss in a jalapeno (deseeded) with the veggies. If you want to keep it mild, use a milder salsa and don’t use the cayenne. The base recipe is kid friendly heat wise.

Use Salsa You’d Actually Eat with Chips

This may be obvious, but since salsa is the main liquid in this recipe, the flavor will be prominent in the finished dish. If you don’t want to eat it straight, you shouldn’t cook with it. Chunky salsas are fine. They just get broken down during the cooking process and become part of the sauce.

Fajita Seasoning Quality Varies Widely

Store-bought packets can be just salt and fillers. If you are using a packet and not making your own, taste the filling before seasoning with more salt at the end. \n\nSome packets contain 400-500 mg of sodium per serving, which can be a lot. Using the recipe above (which should take about 3 minutes), you can have full control over all of the ingredients.

Meal Prep This

This filling can be stored in the fridge for 4 days. If you make a double batch on Sunday, you can have lunches and dinners ready for the next few days, all without lifting a finger! It can also be frozen. Just freeze in zip lock bags and thaw in the fridge the night before you’re ready to eat it.

What to Serve with Crock Pot Chicken Fajitas

The filling is good enough to be eaten alone while standing in tortillas but if you’re feeding a lot of people or if you just want to complete the meal:

• Mexican rice — makes the meal more substantial and soaks up the extra juices
• Refried beans or black beans — add protein and make it more filling
• Cilantro lime rice — the acidity plays well against the smoky seasoning
• Simple green salad — a light counterpoint to the rich filling
• Corn on the cob or elote — turns this into a full summer spread
• Chips and guacamole — because you already have everything out for toppings anyway

Low-Carb and Dairy-Free Options

At the serving stage, all adjustments happen. For low-carb, you can serve it over cauliflower rice, and in place of tortillas, you can use lettuce wraps. For dairy free, omit the sour cream and cheese and substitute with a dairy-free guacamole or just sliced avocado. For gluten-free options, use certified gluten-free tortillas or corn ones, and check your fajita seasoning packet for any wheat-based fillers (some contain them).

Storage and Reheating

Refrigerator

You can keep the filling for the burritos in the refrigerator for 4 days (just don’t keep the tortillas or toppings with them) and be sure to put them in an airtight container. The flavors actually develop some more overnight, which makes day two leftovers taste better.

Freezer

For the best results, we recommend freezing your items in flat zip-top bags for no longer than 3 months. Be sure to write the date directly on the bag. For best results, thaw the bags in the refrigerator overnight. After the peppers have been frozen, they will be noticeably softer; however, the flavor will remain. Please do not include the tortillas or toppings in your freezing bags; they will not survive the freeze-thaw cycle.

Reheating

You can heat it either by microwaving it in one-minute intervals and stirring in between until it is heated through, or you can reheat it in a skillet over medium heat. The skillet method may take a few extra minutes (3 to 4) to heat all the way through, but it is better for the texture of the food because it evaporates extra moisture. If it looks dry, you may need to add a splash of water or chicken broth.

Frequently Asked Questions

Can I use frozen chicken in the slow cooker?

From a technical standpoint, yes, though the USDA cautions cooking from frozen for safety reasons (when frozen, chicken can be in the danger zone for an unsafe amount of time). If you choose to cook from frozen, you must increase the cooking time by at least one to one-and-a-half hours, and check that the internal temperature is at least 165 degrees before consuming. For optimal results, thaw in the refrigerator the night before.

Can I make this with chicken thighs instead of chicken breasts?

Yes, and a lot of folks choose thighs for slow cooker recipes since they’re not as easy to overcook. Boneless skinless thighs are exactly the same — same cook time, same seasoning, same layering technique. The final product is a touch richer and a little more tender.

My filling is too watery. How do I fix it?

For the last 20 to 30 minutes of cooking, remove the lid to release any captured steam. Alternatively, after shredding, you can put the filling into a skillet and run it on medium-high for a few minutes to help get rid of the extra liquid. Some liquid is totally fine and keeps the chicken moist; a good amount of liquid means you probably added extra water or broth that wasn’t necessary.

Can I cook this on HIGH to save time?

Yes. Cook on HIGH for 2 to 3 hours. The trade-off is that you have less margin for error – chicken breasts on HIGH can go from done to rubbery faster than on LOW. Start checking at the 2-hour mark if you are using smaller chicken breasts. Thighs are more forgiving on HIGH.

What tortillas are best for fajitas?

A person might want to use flour tortillas over corn tortillas because with their pliable nature and durability, they can hold more of a filling than corn tortillas can crack and break and you can use more filling with corn tortillas versus flour tortillas. If you’re gluten-free, try to find flour-style gluten-free tortillas as they will give you more stability than corn tortillas. Honestly, all tortillas should be warmed up before eating because cold tortillas don’t taste nearly as good and they’re more likely to crack.

If you enjoy making fajitas, it is worth having a good set of quality flour tortillas in the freezer, as they are quick to thaw and are usually far superior to those that have been in the bread aisle for a week.

Can I add corn or black beans to the slow cooker?

Yes, but there is a caveat. Canned black beans, after being drained and rinsed, should be added in the last hour of cooking. If you add them in earlier, they will be mushy. You can also add canned or frozen corn in the last 30 minutes, or stir it in at the end so it just heats through. Both additions will cause the filling to be more substantial and stretch it further.

How do I keep the chicken from drying out?

The primary offenders here are overcooking and cooking on HIGH on a hotter than average slow cooker. Once the chicken hits 165°F, use a thermometer and pull it. Also, don’t remove any cooking liquid before shredding it — the chicken should be returned to the juice to help reabsorb moisture. A rapid read meat thermometer is by best the best tool when making slow cooker chicken — it totally removes the guesswork.

More Slow Cooker Dinner Recipes

Here are some more slow cooker recipes you might enjoy:

• Crack Chicken Instant Pot Recipe