The Easiest Weeknight Dinner: Easy Crockpot Fajitas Recipe

Say goodbye to pan-frying and constant stirring! These Easy Crockpot Fajitas are the definition of set-it-and-forget-it deliciousness, perfect for busy weeknights when you crave big flavor with minimal effort. This recipe yields tender, juicy strips of seasoned steak (or chicken) and perfectly softened peppers and onions, ready to be piled high onto warm tortillas.

Why You Will Love This Recipe

This dump-and-go slow cooker method is a game-changer for busy cooks. You get the authentic, smoky flavor of traditional fajitas without standing over a hot skillet. It requires very little prep time, making cleanup a breeze. Plus, the slow cooking process ensures the meat becomes incredibly tender and infused with all the wonderful Mexican spices. It’s easily scalable for game nights or feeding a crowd!

Ingredients

• 2 lbs flank steak or skirt steak, sliced thinly against the grain
• 1 large onion, sliced into strips
• 2 bell peppers (any color combination), sliced into strips
• 1 packet (1 oz) low-sodium fajita seasoning mix
• 1/2 cup low-sodium beef broth or water
• 1 tablespoon olive oil
• 1 teaspoon ground cumin
• 1 teaspoon chili powder
• 1/2 teaspoon garlic powder
• Salt and black pepper to taste

Step-by-Step Instructions

1. Prepare the Meat and Vegetables: Slice the flank or skirt steak thinly against the grain into strips about 1/4 inch thick. Slice the onion and bell peppers into similar-sized strips.
2. Combine Ingredients: Place the sliced steak, onions, and bell peppers directly into the basin of your slow cooker (Crockpot).
3. Add Seasoning: Sprinkle the entire packet of fajita seasoning over the meat and vegetables. Add the cumin, chili powder, garlic powder, olive oil, salt, and pepper.
4. Toss to Coat: Use tongs or clean hands to gently toss everything together in the slow cooker until the steak and vegetables are evenly coated with the spices and oil.
5. Cook Low and Slow: Pour the beef broth or water over the mixture. Secure the lid on the Crockpot. Cook on LOW for 6 to 8 hours, or on HIGH for 3 to 4 hours.
6. Shred or Serve Whole: Once cooked, the meat and vegetables should be very tender. You can serve the mixture as is, or for a slightly different texture, you may shred the steak using two forks before serving hot.
7. Prepare Tortillas: While the fajitas are finishing, warm your tortillas according to package directions—either briefly heated in a dry skillet, wrapped in foil in the oven, or microwaved.
8. Assemble and Serve: Spoon the Easy Crockpot Fajitas mixture into the warm tortillas and top with your favorite garnishes.

Expert Tips / Pro Tips

For the juiciest meat, always slice your steak against the grain before adding it to the slow cooker. This breaks up the tough muscle fibers, ensuring tenderness after hours of cooking. Do not skip adding liquid (broth or water); this keeps the environment moist and prevents the spices from burning on the bottom.

If you prefer more char or texture without the effort, you can quickly sear the seasoned steak strips in a very hot skillet for 30 seconds per side before adding them to the slow cooker. This step is optional but adds depth of flavor.

Wait to add any sour cream or cheese directly to the cooker; these dairy items should only be added when serving to maintain the best texture and flavor of the slow-cooked components.

Variations & Substitutions

Protein Swap: These work wonderfully with chicken breasts or thighs, though chicken may only require 4-5 hours on LOW due to its lower cooking threshold. Shrimp can also be used, but only add them during the last 30 minutes of cooking on HIGH, as they cook very quickly.

Spice Level Adjustment: For a spicier kick, add 1/2 teaspoon of cayenne pepper or a finely diced jalapeño (seeds removed) to the mix. For a smoky flavor boost, include 1 teaspoon of smoked paprika.

Homemade Seasoning: Skip the packet and use your own blend: 1 tablespoon chili powder, 1 tablespoon cumin, 1 teaspoon oregano, 1 teaspoon paprika, 1 teaspoon onion powder, and salt/pepper to taste.

Serving Suggestions

Serve these Easy Crockpot Fajitas with warm flour or corn tortillas. Essential toppings include shredded sharp cheddar or Monterey Jack cheese, fresh salsa, guacamole or sliced avocado, a dollop of sour cream or plain Greek yogurt, lime wedges for a final squeeze of acid, and chopped fresh cilantro.

Storage, Freezing & Reheating

Storage: Leftover fajita filling (meat, peppers, and onions) can be stored in an airtight container in the refrigerator for up to 4 days. Store toppings separately.

Freezing: For long-term storage, cool the cooled fajita mixture completely. Transfer to a freezer-safe, airtight container or heavy-duty freezer bag. It freezes well for up to 3 months. Thaw overnight in the refrigerator.

Reheating: Reheat leftovers gently on the stovetop over medium heat, adding a splash of broth or water if the mixture seems dry. Alternatively, microwave in 60-second bursts until heated through.

Nutrition Information

FAQ

Can I use pre-sliced onions and peppers?

Yes, you absolutely can use pre-sliced frozen vegetables to save even more prep time. Just toss them in frozen; they will release extra moisture during the cooking process.

Do I need to sear the meat before putting it in the Crockpot?

No, searing is completely optional. The slow cooker will make the meat tender regardless. Searing is only recommended if you desire a deeper, caramelized flavor on the outside of the meat strips.

What is the best way to slice flank steak thinly?

For the thinnest slices, partially freeze the steak for about 30 to 45 minutes. This firms it up just enough to allow you to slice very thinly against the prominent grain lines.

Easy Crockpot Fajitas

Tender, flavorful chicken fajitas made effortlessly in the slow cooker. Perfect for a weeknight meal with minimal hands-on time.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 4 hours hrs

Total Time 4 hours hrs 15 minutes mins

Servings: 6 servings

Course: Dinner, Main Course

Cuisine: Mexican

Calories: 410

Ingredients Method Notes

Ingredients

  

Fajita Ingredients

• 2.5 lbs boneless, skinless chicken breasts trimmed
• 2 bell peppers one red, one green, thinly sliced
• 1 large yellow onion thinly sliced
• 1 can (10 oz) Ro*Tel diced tomatoes and green chilies drained

Seasoning Mix

• 1 oz packet taco seasoning mix or 3 tablespoons homemade blend
• 2 tsp chili powder
• 1 tsp ground cumin
• 1/2 tsp garlic powder
• 1/2 tsp salt
• 1/4 cup chicken broth

For Serving

• 8-12 flour tortillas warmed
• Optional toppings like sour cream, cheddar cheese, salsa, guacamole

Method

 

Instructions

1. In a small bowl, whisk together the taco seasoning, chili powder, cumin, garlic powder, and salt to create the fajita spice blend.
2. Place the sliced chicken breasts, sliced red and green bell peppers, and sliced onion into the basin of a 6-quart (or larger) slow cooker.
3. Sprinkle the spice blend evenly over the chicken and vegetables. Add the drained Ro*Tel and the half cup of chicken broth over everything. Toss gently to coat all ingredients.
4. Cover the slow cooker and cook on LOW for 6 to 8 hours, or on HIGH for 3 to 4 hours, until the chicken is cooked through and easily shreds.
5. Remove the chicken from the slow cooker and place it on a cutting board. Use two forks to shred the chicken. Return the shredded chicken to the slow cooker and stir to coat it with the pan juices.
6. If the mixture seems too soupy, remove the lid and cook on HIGH for 15-20 minutes to allow some liquid to evaporate. Otherwise, warm the mixture on the ‘Keep Warm’ setting.
7. Serve the hot fajita mixture immediately over warmed flour tortillas with your favorite toppings.

Notes

For extra flavor, add 1 tablespoon of fresh lime juice to the mixture during the last 30 minutes of cooking. If you prefer strips instead of shredded chicken, slice the cooked chicken into strips instead of shredding.