Easy Slow Cooker Chicken Fajitas

These Slow Cooker Chicken Fajitas are perfect for meal prep! Dump in the ingredients then set it to cook all day for a hands-off dinner.

This dish make amazing leftovers, so you’ll have a delicious, fuss-free meal prepped and ready to go for the week. Trust me, this is one of those recipes you’ll keep coming back to!

Why you’ll love this recipe

• Easy dinner: Throw everything in the crockpot and let it cook all day. Easy peasy!
• Meal prep friendly: Make it ahead of time and enjoy the leftovers throughout the week.

If you’re looking for more healthy high protein recipes like this one, then you’ve got to check out my recipe roundup!

Ingredients and substitutions

• Chicken breasts – boneless skinless chicken thighs would also work.
• Fresh salsa – use jarred or homemade salsa instead.
• Garlic – jarred minced or garlic powder will work in a pinch.
• Chili powder – you can use a blend of cayenne, paprika or taco seasoning instead. You could also try using homemade fajita seasoning and omit the cumin.
• Cumin – coriander is the best substitute here, or you can just add more chili powder.
• Yellow onion – red onion, white onion or shallots can be used too.
• Bell peppers – use any colour combination like yellow, red, orange and/or green bell pepper.

Optional toppings

• Grated cheddar cheese – Monterey Jack or a Tex Mex blend would also work.
• Chopped cilantro – leave this off if you’re not a fan of cilantro.
• Corn tortillas – flour tortillas can be used instead.
• Guacamole – try my super easy 4-ingredient guac!

How to make fajitas in the crockpot

Step 1: Prep all your ingredients.

This makes it easier to add to the crockpot all at once.

Step 2: Add the chicken and spices to the crockpot.

Add the chicken, salsa, garlic and spices.

Step 3: Cook the chicken.

Cook the chicken on high for 4 hours or on low for 8 hours.

Step 4: Add the veggies.

Remove the chicken and add in the onions and peppers.

Step 5: Shred the chicken.

While the peppers and onions cook, shred the chicken.

Step 6: Add everything back to the pot.

Mix together the chicken, peppers and onions. Serve in corn tortillas with cheese and cilantro.

Frequently asked questions

Can I use frozen chicken in the crockpot?

I’d recommend thawing the chicken before cooking in the slow cooker to ensure it reaches a safe internal temperature evenly.

How do I prevent the vegetables from becoming too soft?

For crisper veggies, add your bell peppers later in the cooking process, about 15-30 minutes before serving.

Can I cook on high to reduce cooking time?

Yes, you can cook on high for 3-4 hours instead of low for 6-8 hours, but make sure to monitor it to prevent overcooking.

What to serve with chicken fajitas

Here are some ideas on what to serve with these slow cooker chicken fajitas:

• With tortillas and all the fixings like guacamole, pico de gallo, cheese, cilantro and fresh lime wedges
• Over Mexican rice with all your favourite toppings or cauliflower rice for a low-carb option
• With a side of cowboy caviar or refried beans
• Over cooked pasta like this chicken fajita pasta recipe

How to store and reheat

Make-ahead: Prep all ingredients in the slow cooker insert the night before, then store in the fridge until ready to cook.

Store: Keep leftovers in an airtight container in the fridge for up to 4 days.

Reheat: Warm in a skillet over medium heat for 5 minutes or microwave in 30-second intervals until heated through.

Freeze & reheat from frozen: Freeze cooked fajita filling in a freezer-safe container for up to 2 months. Thaw overnight in the fridge, then reheat on the stovetop or in the microwave.

Meal prep tools

• Here’s the slow cooker I use.
• Grab some glass meal prep bowls if you plan on making crockpot chicken fajitas as your weekly lunches.
• I get all my free-range chicken from Butcher Box, conveniently delivered to me frozen.