Slow Cooker Chicken Fajitas

These slow cooker chicken fajitas are one of the easiest dinners you can make. Just toss everything in the slow cooker in the morning and come back to a ready meal.

The chicken comes out so tender that it practically shreds itself. And the peppers and onions get perfectly soft and full of flavor from all those spices.

What I really like about this recipe is how little effort it takes. No standing over the stove, no babysitting a skillet. The slow cooker does all the work for you.

Serve it all in warm tortillas with your favorite toppings, and you’ve got a dinner the whole family will enjoy.

What Makes This Recipe So Good

Hands-Off Cooking at Its Best – You literally season the chicken, pile everything on top, and walk away for hours while the slow cooker does all the heavy lifting, giving you tender, juicy fajitas without standing over a hot skillet.

The Chicken Comes Out Incredibly Tender – Slow cooking chicken breasts low and slow for hours in all those tomato and pepper juices means the meat practically falls apart when you shred it, way more tender than anything you could get from a quick pan sear.

The Flavor Builds While It Cooks – The chili powder, cumin, smoked paprika, garlic, and diced tomatoes with green chiles all meld together over hours of cooking, creating a deep, rich fajita sauce that coats every single piece of chicken and pepper.

Feeds a Crowd Without the Stress – With 2.5 pounds of chicken plus three bell peppers and an onion, this recipe makes a generous amount that can easily feed a full family or a group of friends on taco night.

Ingredients

• 2.5 lb Boneless Skinless Chicken Breasts
• 3 Bell Peppers (red, green, and yellow), sliced
• 1 large Yellow Onion, sliced
• 14.5 oz Diced Tomatoes with Green Chiles (1 can)
• 3 cloves Garlic, minced
• 2 tbsp Chili Powder
• 1 tbsp Cumin
• 1 tsp Smoked Paprika
• 1 tsp Salt
• 1/2 tsp Black Pepper
• 2 tbsp Fresh Lime Juice
• Flour Tortillas, for serving
• Sour Cream, Guacamole, and Shredded Cheese, for topping

Directions

Step 1

Place the chicken breasts in the bottom of the slow cooker. Season them with chili powder, cumin, smoked paprika, salt, and black pepper.

Step 2

Arrange the sliced bell peppers and onion over the chicken. Add the minced garlic and pour the diced tomatoes with green chiles on top.

Step 3

Cover and cook on low for 6 to 7 hours or on high for 3 to 4 hours, until the chicken is cooked through and the peppers are tender.

Step 4

Remove the chicken and slice or shred it into strips. Return the chicken to the slow cooker.

Step 5

Squeeze the fresh lime juice over everything and gently toss the chicken and vegetables together in the flavorful juices.

Step 6

Serve the fajita mixture in warm flour tortillas with sour cream, guacamole, and shredded cheese on the side.

Pro Tips

Keep the Chicken Whole While Cooking

Don’t cut the chicken breasts into pieces before putting them in the slow cooker. Whole breasts stay much juicier over that long cook time because less surface area is exposed to the heat.

If you cut the chicken up first, it tends to dry out and get stringy, even in a slow cooker with all that liquid. You’ll shred or slice it at the end anyway, so there’s no advantage to cutting it beforehand.

Drain the Can of Tomatoes

Before you pour the diced tomatoes with green chiles into the slow cooker, drain about half the liquid from the can. Slow cookers trap all the moisture inside, and the chicken, peppers, and onions will release a lot of their own juices as they cook.

If you dump the full can in without draining, you’ll end up with a soupy fajita mixture instead of something you can actually pile into a tortilla without it falling apart. You want saucy, not watery.

If you find it’s still too liquidy at the end, you can remove the chicken and veggies and let the liquid cook on high uncovered for 15-20 minutes to thicken it up a bit.

Add the Peppers Later for Better Texture

If you want your bell peppers to still have a little bit of bite and not turn completely mushy, add them in during the last 1.5 to 2 hours of cooking on low, or the last hour on high.

Peppers break down fast in a slow cooker, and after 6-7 hours they’ll be super soft and lose that fajita texture you’re going for. The onions are fine to go in from the start since they hold up better and release great flavor into the sauce.

This one extra step makes a big difference in how the final dish looks and tastes. Mushy peppers won’t ruin the flavor, but they won’t give you that classic fajita feel either.

Related Recipes

• Instant Pot Birria Tacos
• Instant Pot Chicken Tortilla Soup
• Instant Pot Salsa Chicken
• Instant Pot White Chicken Chili
• Instant Pot Butter Chicken

Frequently Asked Questions

There’s a lot of liquid at the end – how do I keep the fajitas from being watery?

This is super common with slow cooker fajitas because the chicken and vegetables release a lot of moisture as they cook. The easiest fix is to use a slotted spoon when you serve the fajita mixture so you leave the extra liquid behind in the slow cooker.

If you want to thicken things up a bit more, you can drain off most of the liquid after cooking, or even transfer the shredded chicken and veggies to a hot skillet for a few minutes to let some of that moisture cook off and give everything a slightly caramelized flavor.