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Home » Recipes

Crockpot Flank Steak Fajitas


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Slow cookers are great for entertaining because you can easily get all the work done in advance and have your house smelling amazing when guests arrive (we use this basic, inexpensive slow cooker). Who knew you could set-and-forget Mexican cuisine in the slow cooker so it's ready for dinner? See how this easy and delicious crockpot flank steak recipe comes together in our detailed recipe below. After all, slow cookers aren't just for soups, people!

Make Ahead Crockpot Flank Steak Fajitas

I just made these fajitas myself the other day and my daughters kept asking me “What smells so good??” They couldn’t wait to dig in and if you make the tortillas in advance it will just take some grated cheese, sour cream, and cilantro (plus any other fixings you like on your fajitas), and your feast will be ready in no time. You will love these Chicken Fajita Bowls too!

How Long to Cook Flank Steak in a Slow Cooker

If you cook the flank steak on high for roughly 5-6 hours, you'll end up with perfectly tender, pull-apart flank steak that takes on the spices and sauce flavors perfectly! Just note that different brands of slow cookers may have different heating temperatures despite having the same setting. To avoid drying out your flank steak, be sure to check on it around hour 4 and 5 if at all possible! (For reference, we used the 6Qt Crockpot on "High" for this recipe.)

Best Toppings for Steak Fajitas:

Your family's tastes may vary, but these are some of our favorite toppings to dress up these crockpot flank steak fajitas with!

  • Grated cheese, (try some Mexican Cotija!)
  • Fresh cilantro
  • Squeezed lime juice
  • Sour cream
  • Spinach
  • Sliced Avocado
  • Fresh Jalapenos (If you like more of a kick!)
  • Habanero peppers

I am getting hungry just talking about it. But don’t take my word for it…you must try it for yourself! Or, make these Chicken Fajitas or this Arrachera! For more ideas, try these Steak Recipes.

Slow Cooker Flank Steak Fajitas

Slow Cooker Flank Steak Fajitas

Based on the popularity of my other crock pot “real food” recipes I think you guys will love this one, too. These Slow Cooker Flank Steak Fajitas go great with homemade tortillas and your favorite toppings.
33 Reviews / 4.8 Average
Prep Time: 15 minutes mins
Cook Time: 5 hours hrs
Total Time: 5 hours hrs 15 minutes mins
Course: Dinner
Cuisine: Mexican
Method: Slow Cooker
Diet: Dairy Free, Egg Free, Peanut/Tree Nut-Free
Print Recipe
Servings: 6 people
Save Recipe Saved!

Ingredients
  

  • 1 ½ lbs flank steak (preferably grass fed (we buy ours from Baucom’s Best at the Matthews Farmers’ Market))
  • 1 ½ teaspoons chili powder
  • 1 teaspoon cumin
  • 1 teaspoon coriander
  • ½ teaspoon salt
  • ¼ teaspoon pepper
  • 2 tablespoons soy sauce (preferably the low-sodium variety)
  • 1 jalapeño (seeded and chopped)
  • 2 cloves garlic (minced)
  • 4 bell peppers (any color)
  • 1 onion

Other Fajita Fixings:

  • whole-wheat tortillas
  • cheese (grated)
  • avocado (sliced)
  • cilantro
  • lime
  • spinach
  • sour cream
  • hot peppers

Instructions
 

  • Mix together the dry spices with a fork including the chili powder, cumin, coriander, salt and pepper.
  • Rub the spice mixture over all sides of the flank steak and place it in the bottom of the slow cooker. Sprinkle the soy sauce on top.
  • Top the flank steak with the diced jalapeno and minced garlic. Slice the bell peppers and onion and throw those on top of the steak as well.
  • Turn the slow cooker onto HIGH and cook for 5 – 6 hours or until the steak can easily be shredded with two forks.
  • Drain the meat and peppers well then serve with the recommended fajita “fixings” (listed above).
    Enjoy!

Notes

We recommend organic ingredients when feasible.
Nutrition Facts
Nutrition Facts
Slow Cooker Flank Steak Fajitas
Amount Per Serving
Calories 196 Calories from Fat 54
% Daily Value*
Fat 6g9%
Saturated Fat 2g13%
Cholesterol 68mg23%
Sodium 602mg26%
Potassium 609mg17%
Carbohydrates 8g3%
Fiber 2g8%
Sugar 4g4%
Protein 26g52%
Vitamin A 2655IU53%
Vitamin C 105.8mg128%
Calcium 39mg4%
Iron 2.6mg14%
* Percent Daily Values are based on a 2000 calorie diet.
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38.8K shares

About Lisa Leake

Lisa is a wife, mother, foodie, blogger, and #1 New York Times Best-selling author who is on a mission to cut out processed food.

Comments

  1. DJ says

    October 13, 2021 at 4:48 pm

    3 stars
    First time trying this recipe...the flavors are good. I followed the instructions and cooked
    it on HIGH....the meat was easy to shred, but it seems awefully dry.
    what did I do wrong???

    Reply
    • 100 Days Admin says

      October 15, 2021 at 9:54 am

      You may need to keep an eye on it and check it earlier. As with different ovens, different slow cookers can emit different temps, too sometimes. - Nicole

      Reply
  2. Leigh says

    February 16, 2021 at 7:48 pm

    5 stars
    I’ve followed Lisa for years, but never tried a recipe. Let me tell you. This does not disappoint. I followed the recipe exactly. My only note is that I feel like it needed more salt. I tasted it about 30 minutes before serving, and added about a teaspoon. They were perfect and so easy. My husband requested more recipes from Lisa!!

    Reply
    • 100 Days Admin says

      February 17, 2021 at 9:41 am

      We're so glad you finally gave a recipe a try and it came out great for you. - Nicole

      Reply
  3. Michelle McDonald says

    October 24, 2020 at 6:03 pm

    Made this exactly as directed and cooked for four hours. Checked then and reset for another hour on high. FABULOUS! And so easy. A winner for sure, and pretty healthy, too. Served over cauliflower rice with a salad.

    Reply
  4. Rose says

    May 29, 2020 at 11:43 am

    5 stars
    I have made this several times! I really love it and so do my kids. Nice easy version of fajitas. I love things I can make ahead for company. Pair this with some fresh homemade salsa and it's a perfect meal.

    Reply
  5. Heidi Greentree-Best says

    April 01, 2019 at 3:04 pm

    4 stars
    Delicious! I added a can of fire roasted diced tomatoes and squeezed a lime into the slow cooker. Easy, delicious and the entire family loved it!

    Reply
  6. Tina says

    February 21, 2019 at 1:24 pm

    I love this recipe and so does my family. It is so yummy!

    Reply
    • Tina says

      February 21, 2019 at 1:27 pm

      5 stars
      I forgot to rate the recipe. I love my crockpot. I use it all the time and this recipe is so easy and perfect for making in the crockpot.

      Reply
  7. Suzi says

    February 15, 2019 at 2:05 pm

    5 stars
    Wow! This was delicious and ridiculously easy to thrown into the slow cooker and perfect for a busy week night when we’re coming home late and hungry from activiities. I used flap steak (steak tips) as that’s what I had on hand.
    Yummy. Thanks for a great recipe. I’m excited to try your other ones!

    Reply
  8. Jason Schiller says

    January 06, 2019 at 9:23 am

    Love this recipe!

    Reply
  9. Emily says

    July 29, 2018 at 5:50 pm

    4 stars
    This recipe came out delicious and I would definitely make it again. However, next time I would wait to put the peppers in until the last hour. I ended up with very mushed peppers and lots of tough separated pepper skin.

    Reply
  10. Kim says

    May 16, 2018 at 1:39 pm

    Do you add water?

    Reply
    • Amy Taylor (comment moderator) says

      May 25, 2018 at 9:40 am

      No. It produces liquid on its own.

      Reply
  11. Carla says

    September 25, 2017 at 9:34 pm

    4 stars
    Is there nutritional (or at least calorie) info on this dish? Sorry if I missed it! Made it tonight and the whole (almost) family loved it.

    Reply
    • Amy Taylor (comment moderator) says

      October 03, 2017 at 1:55 pm

      Hi there. We do not provide the nutrition details on our recipes. Our focus is simply getting people to eat real food and to be less concerned about numbers. This post helps explain our philosophy: https://www.100daysofrealfood.com/healthy-eating-defined/.

      Reply
  12. katy says

    July 19, 2017 at 8:27 am

    Does this work well as a freezer meal?

    Reply
    • Amy Taylor (comment moderator) says

      July 24, 2017 at 11:08 am

      Yes, the meat freezes well. Add the other components when ready to serve.

      Reply
  13. Kathy says

    May 12, 2017 at 12:50 pm

    5 stars
    Absolutely delicious and the house smells great for hours!!

    Reply
  14. Aaron says

    November 19, 2016 at 6:55 pm

    Not great. I cook fajitas in the slow cooker all the time and wanted to try something different. I should've listened to my gut and browned all the meat before cooking it in the slow cooker with everything else.

    Reply
  15. Megan says

    June 20, 2016 at 2:39 pm

    3 stars
    I made this in the slow cooker, followed all the directions, and although the flavor was pretty good, the meat was still kinda tough. It shredded easily, but was a little difficult to chew/tear apart when eating a fajita taco. I've always encountered this problem with flank steaks; maybe it should be tenderized first?

    Reply
    • Trisha says

      January 12, 2017 at 9:41 am

      5 stars
      I started making this recipe with pork tenderloin instead for this same reason. It's just as great and a lot easier to eat, especially for my little one.

      Reply
    • Mary says

      September 30, 2017 at 2:26 pm

      How you slice meat makes a big difference in how tender, or not, it is. It is important to cut against the grain, which shortens the fibers and makes it easier to chew through them, since most of the work will have been done with the knife. What that means is cut across the grain, to shorten the muscle fibers, rather than cutting parallel to the grain/muscle fibers. Cutting parallel to/with the grain leaves you with a chewier cut of meat.

      Reply
  16. Cecilia Reynoso says

    June 05, 2016 at 2:17 pm

    5 stars
    Will brisket work as well as flank steak in this recipe? Thanks

    Reply
    • Amy Taylor (comment moderator) says

      July 02, 2016 at 11:51 am

      Hi there. We've not tried. Let us know if you do. :)

      Reply
    • Trisha says

      January 12, 2017 at 9:42 am

      I have been using pork tenderloin and it's excellent. The flank steak had great flavor but it was too tough for my little one to eat.

      Reply
  17. wildbill says

    April 15, 2016 at 1:52 pm

    5 stars
    This was so good I had a hard time stopping! I did it on high for six using local range skirt (bavette) beef. Big bang for the effort! This recipe goes in my "frequent" file for taste, simplicity and economy. I liked the contrasting taste of corn tortillas but I think any tortilla would work just fine.

    Reply
  18. Michela Hugo says

    February 24, 2016 at 12:14 am

    I have made this repeatedly in my electric pressure cooker. It takes only 40 minutes and it turns out perfectly every time! This was the first recipe I've ever found to use flank steak in the slow cooker. So healthy and lean but comes out perfectly shreddable with this method. Love your blog and recipes, Lisa!

    Reply
    • Nat says

      May 26, 2016 at 4:54 pm

      Thank you for commenting on the electric pressure cooker. I just got mine and this is one of my favorite recipes. I wasn't sure how to convert.

      Reply
      • Michela Hugo says

        May 26, 2016 at 5:09 pm

        I love the pressure cooker!! I always use slow cooker recipes and they always turn out perfectly.

    • Sharon says

      March 06, 2019 at 4:03 pm

      I was thinking about doing this in my instant pot also.. but you need atleast a cup of liquid to do so... could you tell me how you cooked it?

      Reply
  19. Jennifer P. says

    February 12, 2016 at 11:40 am

    Is there any other liquid besides the soy sauce?

    Reply
    • Amy Taylor (comment moderator) says

      February 16, 2016 at 3:28 pm

      No, it will make its own liquid.

      Reply
  20. AG says

    January 25, 2016 at 2:27 pm

    Absolutely love this! We tried it in the Fall and it became part of our regular rotation. It's also great for entertaining. I used 3+ lbs of steak and it cooked up beautifully.

    Reply
    • douglas says

      January 26, 2016 at 8:40 am

      5 stars
      totally agree, this is an awesome easy recipe. I used a london broil and it came out great. I also added a small amount of adope chipoltes and it gave it a bit of zing.
      It resembled the Chipolte barbacoa.

      Reply
  21. Awma says

    January 23, 2016 at 9:44 pm

    Have you ever made this on low? How long would it take? Also, do you (or any of your readers) know why my food always seems overcooked in my crock pot even when I follow the recipe to a tee?

    Reply
    • Amy Taylor (comment moderator) says

      January 28, 2016 at 8:40 pm

      Some readers have cooked it on low for 8+ hours.

      Reply
  22. Caroline says

    December 15, 2015 at 12:50 pm

    Any idea what the nutritional values are on this receipt?

    Reply
    • Amy Taylor (comment moderator) says

      December 21, 2015 at 4:56 pm

      Hi Caroline. We do not provide those details. This post might help explain why: https://www.100daysofrealfood.com/2013/01/04/healthy-eating-defined/.

      Reply
  23. karen says

    October 31, 2015 at 6:04 pm

    can I use skirt steak instead of flank?

    if not what else can I use?

    Reply
    • Amy Taylor (comment moderator) says

      November 08, 2015 at 8:00 pm

      Skirt should work fine. :)

      Reply
  24. Sarah says

    October 13, 2015 at 1:08 pm

    Is it okay to cut up the steak before putting it in the slow cooker?

    Reply
    • Amy Taylor (comment moderator) says

      October 15, 2015 at 7:14 am

      Hi Sarah. We've not tried because we shred is at the end. I imagine that small pieces will work, too.

      Reply
  25. Sarah says

    August 25, 2015 at 6:09 pm

    Do I need to add any liquid to this recipe?

    Reply
  26. Dee Handa says

    April 07, 2015 at 10:32 am

    I didn't realize I was going to make this until last minute so I didn't have time to slow cook it. Instead I cut up the grass fed steak (don't remember what cut I picked up, it was marbeled without a bone), doubled the "sauce" and let it marinade in the fridge for about an hour. I cut up the onions and peppers and sauteed them in some unsalted grass fed butter and then added the meat and mixed it well (and it seasoned the veggies to perfection without any additional seasoning needed). We have a local place that gets fresh 4 ingredient tortillas so I served it on those. I used the tomatillo salsa from your website with some organic sour cream and Daiya cheese and my kids inhaled it and my super picky husband said it was beyond delicious. Thank you for all your hard work and time you put into this website. It is my first go to when I need any type of recipe.

    Reply
  27. Leah S. says

    March 08, 2015 at 11:24 am

    5 stars
    I decided it was time to post a review since this is such a regular recipe in our house! We all love it here and it is by far one of my favorite slow cooker recipes. I just wanted to mention that I have occasionally used bison sirloin steaks for this in and it turned out beautifully!

    Reply
  28. Amy Taylor (comment moderator) says

    February 24, 2015 at 11:04 am

    Hi Elissa. You could use a chuck or round roast.

    Reply
  29. Elissa says

    February 21, 2015 at 3:53 pm

    Hi! I've bought all the ingredients to make this 2-3 times...then couldn't find flank steak. We recently bought 1/4 of a grass-fed cow. Would arm steak, sirloin steak, or round steak work in place of flank steak? Just looking at my beef inventory. :) (I also have some chuck or rump roasts.)

    Reply
  30. Kristen says

    January 02, 2015 at 10:56 am

    I have made this recipe several times and it's always a huge hit! Tomorrow I plan to double the recipe and am wondering if I need to increase the amount of time on high it spends in the slow cooker? Thanks!

    Reply
    • Amy Taylor (comment moderator) says

      January 05, 2015 at 9:13 am

      Hi Kristen. We are not usually able to respond to recipe questions in real time. How did it turn out?

      Reply
  31. Kristin says

    December 31, 2014 at 9:01 am

    5 stars
    Love this recipe! Thank you for posting Lisa. It is a favorite in our house!

    Reply
  32. Melynda says

    November 12, 2014 at 11:46 am

    5 stars
    I love these fajitas! They are full of flavor and so simple to prepare. They are a life saver for someone like me who is health conscious and has a hectic schedule. Awesome recipe! Thank you for sharing.

    Reply
  33. Julie says

    November 02, 2014 at 6:51 pm

    5 stars
    I used this recipe only blog and they were delicious, and super easy!! Check out my blog at: http://www.mollys30daychallenge.blogspot.com

    Reply
  34. Melissa D says

    October 01, 2014 at 1:21 am

    Could this work with chicken thighs?

    Reply
    • Amy Taylor (comment moderator) says

      October 04, 2014 at 9:57 am

      Hi Melissa. That's not something we have tried so it would be an experiment. ;)

      Reply
  35. SAMCat12 says

    September 22, 2014 at 11:11 am

    Has anyone made this and frozen part of it for future meals? I never know what is ok to freeze and what isn't... am afraid the peppers would become too mushy? Thoughts?

    Reply
    • Amy Taylor (comment moderator) says

      October 03, 2014 at 7:53 am

      Hi there. You can definitely freeze this. It may effect the texture of the peppers somewhat but they are already very soft from cooking. ~Amy

      Reply
  36. Kelly A says

    September 22, 2014 at 9:25 am

    I'm going to try this but I don't have organic, grass fed flank steak avaialble. Can I use top sirloin?

    Reply
    • Debbie says

      September 22, 2014 at 9:26 am

      Round steak is a good option.

      Reply
    • Amy Taylor (comment moderator) says

      October 03, 2014 at 7:51 am

      Hi Kelly. Sirloin should work, too. ~Amy

      Reply
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Meet Lisa! Lisa is a best-selling cookbook author, wife, mother, and passionate home cook. Lisa began blogging in 2010 and has created a community of millions of people who share her love of healthy living, real food ingredients, and family recipes.

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