Dinner

Slow Cooker Chicken Fajitas Recipe

Name: Slow Cooker Chicken Fajitas Recipe
Prep time: 10 min
Cook time: PT-489896H12M42S
Total time: PT-489896H12M42S
Cuisine: Mexican
Ingredients: 2 pounds boneless skinless chicken breasts; 10 ounces Rotel fire roasted tomatoes & green chiles; 3 medium bell peppers (sliced, divided); 1 medium white onion (sliced, divided); 2 tablespoons taco seasoning; Fajita sized tortillas; Sour Cream; Shredded Cheese; Guacamole or avocado slices; Pico de gallo; Lime wedges; Cilantro; Salsa

ByMariam Harutyunyan October 29, 2025October 29, 2025

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Introduction

Slow Cooker Chicken Fajitas are an effortless and flavorful meal perfect for busy weeknights. Tender chicken cooked with peppers, onions, and a zesty seasoning blend comes together in your slow cooker for a delicious Tex-Mex dinner. Serve with warm tortillas and your favorite toppings for a crowd-pleasing dish.

The image shows a black slow cooker filled with a colorful mix of cooked chicken strips and sliced bell peppers. The chicken pieces are light brown with a slightly grilled texture, spread evenly throughout the dish. The bell peppers come in red, yellow, and green, and are sautéed, soft, and glossy, mixed well with cooked onions that are translucent and slightly caramelized. A pair of red and silver tongs rests on the edge of the slow cooker, partially submerged in the food. The slow cooker sits on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Ingredients

2 pounds boneless skinless chicken breasts
10 ounces Rotel fire roasted tomatoes & green chiles

2 tablespoons taco seasoning
3 medium bell peppers, sliced (divided)

1 medium white onion, sliced (divided)
Fajita-sized tortillas

Sour cream (for serving)
Shredded cheese (for serving)
Guacamole or avocado slices (for serving)

Pico de gallo (for serving)
Lime wedges (for serving)
Cilantro (for garnish)

Salsa (for serving)

Instructions

Step 1: Add the Rotel fire roasted tomatoes and green chiles to the basin of a 6-quart slow cooker.
Step 2: Add half of the sliced bell peppers and onions to the slow cooker.

Step 3: Trim any fat from the chicken breasts and place them on top of the peppers and onions.
Step 4: Sprinkle half of the taco seasoning evenly over the chicken breasts.
Step 5: Layer the remaining sliced peppers and onions on top of the chicken, then sprinkle with the remaining taco seasoning.

Step 6: Cover and cook on LOW for 4 to 6 hours or on HIGH for 3 to 4 hours, until the chicken is cooked through and tender.
Step 7: Remove the chicken from the slow cooker and slice into strips.
Step 8: Drain most of the liquid from the slow cooker, then return the sliced chicken to the pot and stir to combine with the peppers and onions.

Step 9: Serve the chicken and veggies in warm fajita-sized tortillas and top with sour cream, shredded cheese, guacamole, pico de gallo, cilantro, lime wedges, and salsa as desired.

Tips & Variations

Use different colored bell peppers for a vibrant presentation and varied flavor.
For extra spice, add a jalapeño or sprinkle cayenne pepper into the taco seasoning.

Substitute chicken thighs if you prefer a juicier, more flavorful meat option.
Serve with brown rice or quinoa for a hearty, gluten-free meal.

Storage

Store leftover chicken fajita filling in an airtight container in the refrigerator for up to 3 days. Reheat gently in a skillet or microwave until warmed through. Tortillas and fresh toppings are best served fresh but can be stored separately in the fridge.

How to Serve

A soft white tortilla folded in half sits on a white plate with some scattered shredded white cheese and green cilantro leaves around it. Inside the tortilla, there are layers of cooked chicken pieces with a light brown color, bright red bell pepper strips, green pepper pieces, fresh diced red tomatoes, and bits of white cheese. The ingredients appear fresh and moist, with the vegetables adding color and texture on top of the chicken. The plate rests on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use frozen chicken breasts for this recipe?

Yes, but be aware that cooking time may increase slightly. It’s best to thaw the chicken first for even cooking and best texture.

How should I warm the tortillas?

Warm tortillas on a dry skillet over medium heat for about 30 seconds per side, or wrap them in foil and heat in a warm oven for 10 minutes. This makes them soft and pliable for assembling fajitas.