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Dinner / Slow Cooker Chicken Fajitas: Easy & Delicious Recipe

Slow Cooker Chicken Fajitas: Easy & Delicious Recipe

June 4, 2025 by HaileyDinner

Slow Cooker Chicken Fajitas: Imagine coming home after a long day to the tantalizing aroma of perfectly cooked, flavorful fajitas, ready to be piled high on warm tortillas. No last-minute chopping frenzy or standing over a hot stove required! This recipe is about to become your weeknight dinner hero.

Fajitas, a Tex-Mex staple, have a vibrant history rooted in the resourceful cooking of ranch hands in South and West Texas. They utilized tougher cuts of beef, marinating and grilling them over open fires to create a delicious and satisfying meal. Over time, the dish evolved, incorporating chicken, peppers, and onions, becoming the beloved fajitas we know and crave today.

What makes fajitas so irresistible? It’s the symphony of flavors and textures! The savory, seasoned chicken, the slightly sweet and caramelized peppers and onions, all wrapped in a soft, warm tortilla. Plus, the customizable nature of fajitas makes them a crowd-pleaser. Everyone can add their favorite toppings, from sour cream and guacamole to salsa and cheese. And with this Slow Cooker Chicken Fajitas recipe, you get all that deliciousness with minimal effort. The slow cooker does all the work, infusing the chicken with incredible flavor and tenderness. It’s the ultimate set-it-and-forget-it meal that delivers big on taste and convenience. Get ready to enjoy restaurant-quality fajitas in the comfort of your own home!

Slow Cooker Chicken Fajitas this Recipe

Ingredients:

  • 1.5 lbs boneless, skinless chicken breasts
  • 1 large bell pepper (any color, or a mix!), sliced
  • 1 large onion, sliced
  • 1 packet fajita seasoning (or homemade blend – recipe below!)
  • 1 (14.5 oz) can diced tomatoes, undrained
  • 1/2 cup chicken broth
  • Optional: 1 jalapeño, seeded and minced (for extra heat!)
  • Optional: Juice of 1 lime
  • Tortillas, for serving
  • Toppings: Sour cream, guacamole, salsa, shredded cheese, cilantro, etc.

Homemade Fajita Seasoning (Optional):

  • 2 tablespoons chili powder
  • 1 tablespoon cumin
  • 1 tablespoon paprika
  • 1 teaspoon garlic powder
  • 1 teaspoon onion powder
  • 1/2 teaspoon dried oregano
  • 1/2 teaspoon cayenne pepper (or less, to taste)
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper

Instructions:

Preparing the Chicken and Vegetables:

  1. First, let’s get our chicken ready. You can leave the chicken breasts whole, or cut them into strips before adding them to the slow cooker. Cutting them into strips will result in faster cooking and easier shredding later. I usually opt for strips because I’m impatient!
  2. Next, prepare your vegetables. Slice the bell pepper and onion into strips. The thickness is up to you, but I prefer them to be about 1/4 inch thick so they cook evenly. If you’re using a jalapeño, carefully seed it and mince it finely. Remember to wash your hands thoroughly after handling jalapeños!
  3. If you’re making your own fajita seasoning, now’s the time to mix it up! In a small bowl, combine the chili powder, cumin, paprika, garlic powder, onion powder, oregano, cayenne pepper, salt, and pepper. Give it a good stir to ensure everything is well combined. This homemade blend is so much better than store-bought, in my opinion, and you can adjust the spices to your liking.

Slow Cooking the Fajitas:

  1. Now, it’s time to assemble everything in the slow cooker. Place the sliced bell peppers and onions in the bottom of the slow cooker. This will help prevent the chicken from sticking and burning.
  2. Lay the chicken breasts (or strips) on top of the vegetables.
  3. Sprinkle the fajita seasoning evenly over the chicken and vegetables. Make sure everything is well coated. If you’re using the store-bought packet, just pour it over.
  4. Pour the can of diced tomatoes (undrained) over the chicken and vegetables. The liquid from the tomatoes will help keep everything moist during cooking.
  5. Add the chicken broth to the slow cooker. This will provide additional moisture and help create a flavorful sauce.
  6. If you’re using jalapeño, sprinkle it over the mixture now.
  7. Cover the slow cooker and cook on low for 6-8 hours, or on high for 3-4 hours. The cooking time will depend on your slow cooker and the thickness of the chicken. The chicken is done when it’s easily shredded with a fork.

Shredding and Serving:

  1. Once the chicken is cooked through, carefully remove it from the slow cooker and place it on a cutting board. Use two forks to shred the chicken into bite-sized pieces.
  2. Return the shredded chicken to the slow cooker and stir it into the vegetables and sauce. This will allow the chicken to absorb even more flavor.
  3. If you want to add a little extra zing, squeeze the juice of one lime over the fajita mixture. This is optional, but I find it brightens up the flavors nicely.
  4. Let the chicken and vegetables simmer in the slow cooker for another 15-20 minutes to allow the flavors to meld together.
  5. Now, it’s time to serve! Warm your tortillas according to package directions. You can warm them in a dry skillet, in the microwave, or even over an open flame (carefully!).
  6. Fill each tortilla with the slow cooker chicken fajita mixture.
  7. Top with your favorite toppings, such as sour cream, guacamole, salsa, shredded cheese, and cilantro. Get creative and add whatever you like!
  8. Serve immediately and enjoy! These fajitas are also great for meal prepping. Store any leftovers in an airtight container in the refrigerator for up to 3 days.

Tips and Variations:

  • Spice Level: Adjust the amount of cayenne pepper in the homemade fajita seasoning to control the spice level. You can also add a pinch of red pepper flakes for extra heat.
  • Vegetables: Feel free to add other vegetables to your fajitas, such as mushrooms, zucchini, or corn.
  • Beans: Add a can of black beans or pinto beans to the slow cooker for extra protein and fiber.
  • Bell Pepper Colors: Using a mix of different colored bell peppers (red, yellow, orange, green) will make your fajitas more visually appealing and add a variety of flavors.
  • Chicken Thighs: You can substitute chicken thighs for chicken breasts. Chicken thighs are more flavorful and tend to stay more moist during slow cooking.
  • Serving Suggestions: Serve your fajitas with a side of Mexican rice and refried beans for a complete meal.
  • Make Ahead: You can prepare the vegetables and homemade fajita seasoning ahead of time and store them in the refrigerator until you’re ready to cook.
  • Freezing: Cooked fajitas can be frozen for up to 2 months. Allow them to cool completely before transferring them to a freezer-safe container. Thaw overnight in the refrigerator before reheating.
  • Reheating: Reheat leftover fajitas in the microwave, in a skillet over medium heat, or in the oven at 350°F until heated through.
  • Slow Cooker Size: This recipe is designed for a 6-quart slow cooker. If you have a smaller slow cooker, you may need to reduce the ingredients accordingly.
  • Low Carb Option: Serve the fajita mixture over cauliflower rice or in lettuce wraps for a low-carb option.
  • Marinating the Chicken: For even more flavor, marinate the chicken in the fajita seasoning for at least 30 minutes before adding it to the slow cooker. You can also marinate it overnight in the refrigerator.
  • Adding Beer: For a richer flavor, add 1/2 cup of beer to the slow cooker along with the chicken broth.
  • Using a Grill: If you prefer grilled fajitas, you can grill the chicken and vegetables separately and then slice them and serve them in tortillas.
  • Cream Cheese: For a creamy texture, stir in 4 ounces of cream cheese during the last 30 minutes of cooking.

Slow Cooker Chicken Fajitas

Conclusion:

So, there you have it! These Slow Cooker Chicken Fajitas are truly a game-changer for busy weeknights or relaxed weekend gatherings. I genuinely believe this recipe is a must-try because it delivers incredible flavor with minimal effort. The chicken becomes unbelievably tender, infused with all those delicious fajita spices, and the peppers and onions soften to perfection. Forget standing over a hot stove – let your slow cooker do all the work!

But the best part? The versatility! While I love serving these fajitas in warm tortillas with all the classic fixings like sour cream, guacamole, and salsa, the possibilities are endless. Think about using the shredded chicken in a vibrant fajita salad, piled high with fresh greens, black beans, corn, and a zesty lime dressing. Or, how about creating a cheesy fajita quesadilla for a quick and satisfying lunch? You could even use the chicken as a topping for nachos, adding a spicy and flavorful kick to your favorite game-day snack. For a low-carb option, serve the fajita mixture over cauliflower rice or alongside a simple green salad.

Serving Suggestions and Variations:

  • Classic Fajitas: Warm flour or corn tortillas, sour cream, guacamole, salsa, shredded cheese, chopped cilantro, and a squeeze of lime.
  • Fajita Salad: Mixed greens, black beans, corn, diced tomatoes, avocado, a lime vinaigrette, and a generous helping of the slow-cooked chicken.
  • Fajita Quesadillas: Flour tortillas filled with the chicken mixture and shredded cheese, grilled until golden brown and the cheese is melted.
  • Fajita Nachos: Tortilla chips topped with the chicken, melted cheese, jalapenos, sour cream, and guacamole.
  • Low-Carb Fajitas: Serve the chicken and vegetables over cauliflower rice or with a side salad.
  • Spice it Up: Add a pinch of cayenne pepper or a dash of hot sauce to the slow cooker for an extra kick.
  • Vegetarian Option: Substitute the chicken with portobello mushrooms or black beans for a delicious vegetarian fajita filling.

I’ve tried countless fajita recipes over the years, and I can honestly say that this slow cooker version is one of my absolute favorites. It’s so convenient, so flavorful, and so easy to customize to your liking. I encourage you to give these Slow Cooker Chicken Fajitas a try – I promise you won’t be disappointed!

Once you’ve made them, I’d absolutely love to hear about your experience! Did you make any variations? What were your favorite toppings? Share your photos and comments below – I’m always looking for new ideas and inspiration. Cooking is all about sharing and connecting, and I can’t wait to see what you create. Happy cooking!

Don’t forget to rate the recipe and share it with your friends and family! Let’s spread the word about this easy and delicious way to enjoy fajitas. I’m confident that this recipe will become a staple in your household, just like it has in mine. Enjoy!


Slow Cooker Chicken Fajitas: Easy & Delicious Recipe

Easy and flavorful slow cooker chicken fajitas! Tender chicken and vibrant veggies simmered in a delicious fajita seasoning, perfect for a quick and satisfying weeknight meal.

Prep Time15 minutes
Cook Time360 minutes
Total Time215 minutes
Category: Dinner
Yield: 6-8 servings
Save This Recipe

Ingredients

  • 1.5 lbs boneless, skinless chicken breasts
  • 1 large bell pepper (any color, or a mix!), sliced
  • 1 large onion, sliced
  • 1 packet fajita seasoning (or homemade blend – recipe below!)
  • 1 (14.5 oz) can diced tomatoes, undrained
  • 1/2 cup chicken broth
  • Optional: 1 jalapeño, seeded and minced (for extra heat!)
  • Optional: Juice of 1 lime
  • Tortillas, for serving
  • Toppings: Sour cream, guacamole, salsa, shredded cheese, cilantro, etc.
  • 2 tablespoons chili powder
  • 1 tablespoon cumin
  • 1 tablespoon paprika
  • 1 teaspoon garlic powder
  • 1 teaspoon onion powder
  • 1/2 teaspoon dried oregano
  • 1/2 teaspoon cayenne pepper (or less, to taste)
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper

Instructions

  1. Preparing the Chicken and Vegetables: Slice the chicken breasts into strips (optional, but recommended for faster cooking). Slice the bell pepper and onion into 1/4-inch thick strips. If using jalapeño, seed and mince it finely. If making homemade fajita seasoning, combine all seasoning ingredients in a small bowl and mix well.
  2. Slow Cooking the Fajitas: Place the sliced bell peppers and onions in the bottom of the slow cooker. Lay the chicken breasts (or strips) on top of the vegetables. Sprinkle the fajita seasoning evenly over the chicken and vegetables. Pour the can of diced tomatoes (undrained) over the chicken and vegetables. Add the chicken broth to the slow cooker. If using jalapeño, sprinkle it over the mixture now.
  3. Cover the slow cooker and cook on low for 6-8 hours, or on high for 3-4 hours. The chicken is done when it’s easily shredded with a fork.
  4. Shredding and Serving: Once the chicken is cooked through, carefully remove it from the slow cooker and place it on a cutting board. Use two forks to shred the chicken into bite-sized pieces.
  5. Return the shredded chicken to the slow cooker and stir it into the vegetables and sauce. If you want to add a little extra zing, squeeze the juice of one lime over the fajita mixture.
  6. Let the chicken and vegetables simmer in the slow cooker for another 15-20 minutes to allow the flavors to meld together.
  7. Warm your tortillas according to package directions. Fill each tortilla with the slow cooker chicken fajita mixture.
  8. Top with your favorite toppings, such as sour cream, guacamole, salsa, shredded cheese, and cilantro. Serve immediately and enjoy!

Notes

  • Spice Level: Adjust the amount of cayenne pepper in the homemade fajita seasoning to control the spice level.
  • Vegetables: Feel free to add other vegetables to your fajitas, such as mushrooms, zucchini, or corn.
  • Beans: Add a can of black beans or pinto beans to the slow cooker for extra protein and fiber.
  • Bell Pepper Colors: Using a mix of different colored bell peppers (red, yellow, orange, green) will make your fajitas more visually appealing and add a variety of flavors.
  • Chicken Thighs: You can substitute chicken thighs for chicken breasts. Chicken thighs are more flavorful and tend to stay more moist during slow cooking.
  • Serving Suggestions: Serve your fajitas with a side of Mexican rice and refried beans for a complete meal.
  • Make Ahead: You can prepare the vegetables and homemade fajita seasoning ahead of time and store them in the refrigerator until you’re ready to cook.
  • Freezing: Cooked fajitas can be frozen for up to 2 months. Allow them to cool completely before transferring them to a freezer-safe container. Thaw overnight in the refrigerator before reheating.
  • Reheating: Reheat leftover fajitas in the microwave, in a skillet over medium heat, or in the oven at 350°F until heated through.
  • Slow Cooker Size: This recipe is designed for a 6-quart slow cooker. If you have a smaller slow cooker, you may need to reduce the ingredients accordingly.
  • Low Carb Option: Serve the fajita mixture over cauliflower rice or in lettuce wraps for a low-carb option.
  • Marinating the Chicken: For even more flavor, marinate the chicken in the fajita seasoning for at least 30 minutes before adding it to the slow cooker. You can also marinate it overnight in the refrigerator.
  • Adding Beer: For a richer flavor, add 1/2 cup of beer to the slow cooker along with the chicken broth.
  • Using a Grill: If you prefer grilled fajitas, you can grill the chicken and vegetables separately and then slice them and serve them in tortillas.
  • Cream Cheese: For a creamy texture, stir in 4 ounces of cream cheese during the last 30 minutes of cooking.

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