Crockpot Steak Fajitas is a dump-and-cook recipe that transforms an inexpensive cut of beef into a memorable, flavorful dinner recipe that is perfect for any night of the week.
Looking for more fajita recipes? Try out my easy recipes for Vegetarian Fajitas, Instant Pot Steak Fajitas, and Honey Lime Chicken Fajitas.
This recipe for Slow Cooker Steak Fajitas has all the delicious flavors of traditional fajitas minus the hassle, the sizzling skillet, and the price tag.
why use the slow cooker?
When it comes to making fajitas, using the crockpot may seem like an odd choice, as fajitas typically are a fast-cooking skillet recipe. But there are several reasons this recipe works.
- Less Expensive. By cooking low and slow, you can use a less expensive cut of beef to make crockpot steak fajitas, and the beef will still become perfectly tender.
- Hands-Off. After slicing the beef, peppers, and onions, this slow cooker does the work for you.
- No Smoking Skillet. If you have made steak fajitas on the stovetop or ordered steak fajitas out, you know that traditional steak fajitas produce a lot of smoke and a lingering smell. The slow cooker keeps that permeating smell of smoke out of your kitchen and clothes.
Notes on Ingredients
- Steak: Because this is a recipe for crockpot steak fajitas, a less expensive cut of meat works great. Choose a cut of beef like flank steak, round steak, or sirloin steak.
- Onions and Peppers: Use any variety of bell peppers and onions you like. This is also a great time to take a shortcut and use a bag of frozen peppers and onions.
- Homemade Fajita Seasoning: This is a simple blend of pantry staples, including chili powder, cumin, smoked paprika, salt, onion powder, and garlic powder.
- Tomatoes with Diced Green Chiles: Be sure to use MILD if you don't want your crockpot fajitas to be too spicy.
- Fresh Lime Juice and Zest: Don't overlook this! Adding the zest and juice of fresh lime will wake up the flavors.
How to Make Slow Cooker Steak Fajitas
- Using a sharp knife, thinly slice your chosen cut of steak, against the grain, into ½-inch strips. Pro-tip: Place your steak into the freezer for 10-20 minutes--this makes it MUCH easier to slice.
- Cut fresh peppers and onions into ½-inch strips.
- Place the steak, peppers, and onions into the slow cooker.
- Add in the fajita seasoning and toss to coat.
- Pour tomatoes over top and spread to cover the meat.
- Cook on low for 6 hours or on high for 3-4 hours.
- Once cooking time is finished, mix in the zest and juice of the limes and fresh chopped cilantro, to add brightness to these fajitas.
Serving Suggestions
- For Traditional Fajitas, use a slotted spoon to drain off excess liquid and then serve the mixture on Homemade Flour Tortillas, with sour cream, cheese, and/or sliced avocado.
- Serve the mixture and cooking liquid over Instant Pot Quinoa, Instant Pot Cilantro Lime Rice, or Instant Pot Brown Rice.
- Pair these steak fajitas with Instant Pot Refried Beans, Instant Pot Spanish Rice, and a side of Homemade Guacamole, for a delicious restaurant-quality dinner.
Storage
Once cooled, any leftover steak fajita mixture can be stored in an airtight container for up to 4 days. You can also opt to freeze the mixture for up to 1 month.
More Easy Tex-Mex Recipes
- Crockpot Salsa Chicken
- Instant Pot Chicken Tacos
- The Best Taco Meat
- Easy Chicken Enchilada Casserole
If you enjoyed these Crockpot Steak Fajitas, I would love for you to leave a comment and rating below.
Slow Cooker Steak Fajitas
Crockpot Steak Fajitas is a dump-and-cook recipe that transforms an inexpensive cut of beef into a memorable, flavorful dinner recipe that is perfect for any night of the week.
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Servings: 6
Calories: 271kcal
Ingredients
- 1 pound flank or sirloin steak sliced against the grain into ½-inch strips
- 1 tablespoon fajita seasoning
- 1 red bell pepper thinly sliced
- 1 green bell pepper thinly sliced
- 1 yellow bell pepper thinly sliced
- 1 onion thinly sliced
- 15 ounces diced tomatoes with green chiles (Rotel Tomatoes)
- 1 bunch fresh cilantro chopped (optional)
- 2 limes juice and zest
For Serving
- tortillas, sour cream, Greek yogurt, shredded cheese, etc
Instructions
- Place the sliced steak, peppers, and onions in a slow cooker. Season with fajita seasoning and toss to coat.
- Pour the diced tomatoes over top of the mixture and spread out evenly.
- Cook on low for 6 hours or on high for 3-4 hours.
- Once cooking time is finished, mix in the zest and juice of the limes and cilantro if using.
- Serve with a slotted spoon for fajitas or with the cooking liquid over rice or quinoa.
Equipment Needed
Notes
Peppers and Onions: Use any color of peppers or a variety of peppers as the recipe states. You can also opt to use a 16-ounce bag of frozen pepper and onion strips in place of fresh peppers and onions--no need to defrost!
Leftovers: Once cooled, any leftover steak fajita mixture can be stored in an airtight container for up to 4 days. You can also opt to freeze the mixture for up to 1 month.
For the Fajita Seasoning: use 1 teaspoon chili powder, ½ teaspoon cumin, ½ teaspoon smoked paprika (or regular paprika), ½ teaspoon salt, ¼ teaspoon onion powder, ¼ teaspoon garlic powder, and a dash of cayenne pepper.
Nutrition
Calories: 271kcal | Carbohydrates: 26g | Protein: 29g | Fat: 6g | Saturated Fat: 2g | Cholesterol: 68mg | Sodium: 421mg | Potassium: 928mg | Fiber: 7g | Sugar: 3g | Vitamin A: 6515IU | Vitamin C: 33.1mg | Calcium: 109mg | Iron: 4.6mg
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nicole
Can I ask a silly question. I haven't used this function yet and have read your other article on how to use medium or high (high plus 15m per hour), so I get that. But do I need to leave the lid of venting? So that the pressure doesn't build up? Can I use my glass lid so I can see what is going on? Its probably a really stupid question but I've no idea. I love your site. Thank you so much for all of these articles and may God bless you!
Kristen Chidsey
Hi Nicole. You can use the glass lid OR you can use your regular Instant Pot Lid (just leave vent knob to venting, not sealed--although the instant pot should never get hot enough to seal anyways) Or you can make this recipe super quickly with my Instant Pot Steak Fajitas
Nutmeg Nanny
I love busting out my slow cooker in the summer. This needs to happen asap!
Kristen Chidsey
Yes, it does!
KC the Kitchen Chopper
I buy flank steaks for grilling but have never cooked the strips in a crock. These tacos look super delish.
Kristen Chidsey
They work great in crock pot too. Or so does a london broil and is cheaper!
Joy @ Joy Love Food
We love flank steak, but I've never made it in the slow cooker, great idea, my son loves both steak and tacos, so I will have to try this soon!
Kristen Chidsey
I hope you do Joy!
Lucy
These fajitas look so yummy! I've never cooked flank steak in the slow cooker, but you've totally inspired me to try. Love all the spices and fresh cilantro!
Kristen Chidsey
Thanks Lucy--hope you enjoy them!
Denise Wright
Wow this looks so easy. I'm going to have to try it. I usually do chicken because I never knew what kind of beef to use. Flank steak huh? I've never tried those frozen pepper either but I've always wanted to. Great recipe!
Kristen Chidsey
Denise, flank steak (or london broil--even cheaper) and frozen pepper strips make this an easy and affordable meal
Stephanie @ Daily Appetite
I don't think I would be able to stay out of the slow cooker! These looks so good.
Kristen Chidsey
Totally acceptable to sneak a few 🙂
Jessica @ A Kitchen Addiction
I've never tried making fajitas in the slow cooker before! Can't wait to try this!
Kristen Chidsey
I hope you give these a try Jessica. We LOVE them in our family!
David @ CookingChat
interesting! not something I would have thought to make in the slow cooker, sounds tasty.
Kristen Chidsey
Give it a try David--so good!
Ronda Eagle
I have just started using my crock pot more and I'm loving all the delicious meals I can coax out of it with just a modicum of attention to cooking time and ingredient. I'm going to add these Slow Cooker Steak Fajitas to my meal plan to try.
Kristen Chidsey
I LOVE my slow cooker Ronda!