Slow Cooker Chicken Fajitas (Perfect for Meal Prep)

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There’s a reason slow cooker chicken fajitas are on repeat in our house. With simple ingredients, zero babysitting, and a major flavor payoff, this is one of those easy dinner recipes that checks every box.

It’s the perfect weeknight dinner for busy people, especially when you want to meal prep once and eat fajitas, tacos, burrito bowls, or wraps all week long. Just toss everything in your 6-quart slow cooker, and let it do the work while you go live your life.

Ingredients for Slow Cooker Fajitas

Boneless skinless chicken breasts or thighs
Bell peppers (red, yellow, green)
Yellow onion
Fajita seasoning
Salt + pepper to taste

Great way to use up leftover produce or customize based on what’s in your fridge.

How to Make Crockpot Chicken Fajitas

Mix the fajita seasoning with the oil

Combine fajita seasoning with the chicken and ensure chicken is throughly coated

Add half peppers and onions to slow cooker

Place half of the sliced peppers and onions on the bottom of the slow cooker.

Add chicken on top, then add in a squeeze of lime juice

Top with the remaining bell peppers and onions.

Cover and cook on low heat for 6–8 hours or on high heat for 3–4 hours, until the internal temperature of the chicken reaches 165ºF.

Remove chicken, shred or slice, then return to the pot to soak up that flavorful fajita mixture.

Best part? It tastes even better the next day.

Serving Tips For Slow Cooker Fajitas

Use a slotted spoon to remove excess liquid when serving. We love these in:

Flour tortillas or corn tortillas
Over Mexican rice or cauliflower rice
As a fajita bowl with avocado, sour cream, salsa, and cheese
Tucked into lettuce wraps for a low-carb option

Meal prepping? Store in an airtight container in the fridge for up to 4 days. Use leftovers in quesadillas or wraps!

Tips

Want to make this a freezer meal? Add all ingredients to a freezer bag, label, and freeze flat. When ready to cook, thaw overnight in the fridge and follow the recipe as written.

This is in our regular rotation because it makes dinner (and lunch the next day) so easy. It’s full of the delicious flavors of traditional fajitas without needing a skillet or stovetop. No mess, no fuss.

FAQ’s

Absolutely! Flank steak or skirt steak works well—just slice it thin against the grain after cooking.

No extra liquid is needed. The chicken and veggies release enough juices to keep everything moist and flavorful.

Store cooked fajitas in an airtight container in the fridge for up to 4 days. Reheat on the stovetop or in the microwave until warm.

Classic toppings include shredded cheese, sour cream, salsa, guacamole, and fresh cilantro.

Serve the fajitas in lettuce wraps or over cauliflower rice instead of tortillas.

This delicious slow cooker fajitas recipe is everything I want on a busy weeknight: low effort, packed with flavor, and easy to repurpose into new things. Next time you’re looking for a new recipe to make your busy days easier, this one’s it.

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