Slow Cooker Flank Steak Fajitas

33 Reviews / 4.8 Average
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.
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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).

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.

I am getting hungry just talking about it. But don’t take my word for it…you must try it for yourself!

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172 thoughts on “Slow Cooker Flank Steak Fajitas”

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Recipe Rating

  1. 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.

  2. 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!

    1. 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.

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

    2. 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?

  3. 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.

    1. 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.

  4. 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?

    1. Amy Taylor (comment moderator)

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

  5. 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.

  6. 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!

  7. 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.)

  8. 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!

    1. Amy Taylor (comment moderator)

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

  9. 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.

  10. 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?

    1. Amy Taylor (comment moderator)

      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

  11. I made this meal today for my family but my meat turned out really tough. We had a hard time cutting through it with a knife! This has happened to me a couple different times with my slow cooker. I followed the recipe exactly. Do you know if tough meat means I am cooking my meat too long or not long enough? The meat and vegetables in this recipe produced alot of juice. Did the meat boil in the juice and therefore turn out tough? I really have no idea why my meat in several recipes have really not turned out well. I would love to use my slow cooker with confidence but so far all I have made with it are several very disappointing meals! I would appreciate any advice you can give me.

    1. Jennifer, I would try cooking on low instead of high. I rarely use my crock pot on high and have almost always had great results from any recipe. Low and slow is the key to tender meat in the crock pot

  12. I made this yesterday for my fiancé because I wasn’t going to be home. He works all day, so it cooked on low for 8 hours and he texted me specifically to tell me how good it was. For most people that’s not really a big deal, but I rarely get more than an, “it’s fine” when I ask him how he likes a meal. Going out of his way to tell me how good it was is high praise.

  13. Hi! I see that you said to cook it on high for 5-6 hours, but will it do just as well on low for 9-10? I would like to prep it before I leave for work and have it ready when I return home at the end of the day. Thanks!

    1. Assistant to 100 Days (Amy)

      Hi Corrinne. Some readers have cooked it on low for longer with success. I think it should work fine. ~Amy

  14. 5 stars
    I made this last night and it was delicious. Next time I make it I was thinking of leaving the peppers out until the last hour so they remain a little crisper. Do you think there would enough liquid to cook the steak with out the peppers in the pot?

    1. Assistant to 100 Days (Amy)

      Hi Allison. We’ve not tried. FYI: the peppers add a lot to the flavor of the steak, too. ~Amy

  15. Tried this the other night and loved it! But the crazier thing was that my husband loved it! He normally “likes” my cooking to be nice. There was a definite difference in his tone and gestures this time!! Thanks for a great recipe!

  16. Hi! It seems that my flank streak does not fit on the bottom of my crock pot. It’s a bit big. I think it’s a little over 1 1/2 pounds. Is that ok? Will it still cook safely? (I clearly don’t use the crock pot much:))

    1. Assistant to 100 Days (Amy)

      Hi Jennifer . We are rarely able to answer recipe questions in real time. Did it turn out okay? As long as your crock pot lid fits on without a gap, you should be fine. ~Amy

  17. In regards to tortillas. I found some that have the following ingredients: corn, water and lime (calcium hydroxide). A Google search explained that calcium hydroxide is just limes that are dehydrated then ground up… Are these tortillas ok to eat, given the calcium hydroxide in them? Thanks!

  18. 5 stars
    I came across this recipe by accident. I’m trying to find new and delicious recipes for my slow cooker. This one sounded very easy and yummy. Followed recipe exactly and I can tell you it was soooo good. Defiantly a keeper. I’m passing it on to my son. Thanks

  19. Hi! Do I have to top the slow cooker with water?? Everytime I use my slow cooker I use water, but the recipe doesn’t say I need to.

    Thank you!

  20. Going to plan this for next week – how spicy is it? Trying to decide if I should leave the jalapeno out or not – my kids will handle a little, but not too much.

  21. 5 stars
    I just wanted to say thank you for this absolutely delicious and simple recipe!!! The whole family loved it! I used a 2 1/2 lb flank steak with the same number of peppers and onions and just increased the spices and it was perfect.

  22. I want to double this recipe. Do you think it will turn out just as well by cooking in a large crockpot? I have a dinner party of 8 to make this for.

    1. Assistant to 100 Days (Amy)

      Hi Monica. I do. You might need to increase cook time a bit. You will know it is ready when it can be easily shredded with two forks. ~Amy

  23. 5 stars
    I made this with an organic, grass fed pot roast (couldn’t find flank steak.) It turned out fantastic! The meat was so tender and flavorful!

    I used the leftovers to make Tortilla soup. I reserved the drained juices, added some corn, the leftover meat and veggie mixture, a little more broth, some salsa, and spices. We threw a little sour cream and crunched some organic tortilla chips on top. It turned out wonderfuly.

    I was able to get a dinner for 4 (fajitas,) lunch for 1 (fajitas,) dinner for 6 (soup,) dinner for 3 (soup) and 3 more lunches out of basically 1 meal!

  24. 5 stars
    These were slap-your-mama good! I was looking for something to feed company after my daughter’s gymnastics meet. I pre-made these that morning and stuck them in the crock pot at noon. We we came home for dinner, everything was cooked and ready. They tasted amazing!!!!

  25. We are doing a serious 2014 budgeting plan and I’m making it a “real food” change too. These were amazing and will turn into Quesadillas later this week. Thanks for doing all the dirty work learning for us. As a full time working mom I didn’t know where to start. These recipes are a life saver.

  26. Thank you for the ideas and recipe! Celebrated the new year with some steak fajitas with all the trimmings, which I’ve never done before. Turned out great and couldn’t be happier. Great blog overall, thanks!

  27. 5 stars
    This is so good!! Even my picky eater devoured 2 fajitas. And being a super-easy crock pot recipe makes it even better. This just became a family favorite! Thank you!!

  28. Delicious! My husband was skeptical, since we grill fajitas frequently, but I wanted to try a slow cooker meal that produced fajitas for tacos when the weather wasn’t good for grilling. Followed the recipe exactly, and they were great. Thanks!

  29. 5 stars
    I made this-used top sirloin instead because flank steak at my store wasn’t grass fed. It was awesome! I am not that into peppers, but slow-cooking them added just the right heat and amount of flavor. I am using the leftovers for nachos. Since organic or grass fed meat is so expensive, when I do use it, I get more bang for my buck by making two meals instead of one!

  30. Hi,
    I am making this as I type, but I could not bring myself to place such a tough cut of meat on “high” in the crock pot, so mine is set on “low” for 7 hours. However, I will be checking it to see it it is done before the 7 hours are up. I will let you know if a lower temp is a better idea. I think her grass fed beef is probably juicier and more tender than my supermarket flank steak, so I think cooking it on low may give me the same result as the original recipe. I will let you know!!

  31. 5 stars
    Have enjoyed this meal several times. Am glad for the addition to our monthly menu. I couldn’t believe I could make something so yummy :)

  32. Love this recipe and I can not wait to make it. Especially during the school year when things get hectic it is nice to have something already cooking in the crock pot. However, I am wondering why grass fed beef is so important and why you avoid grain fed beef?
    Thank you!

  33. My comment is above but email address is wrong on it so I wanted to make another one so it would
    Notify me via email when you responded :) thx

  34. Hi! Do you think this would work with chicken in the crockpot? Either a whole chicken or boneless, skinless chicken breasts? Thanks!

  35. Just made this recipe for my husband with a steak from the local farmers market…. Delicious!! And that is coming from someone who rarely likes meat. Definitely a keeper.

  36. Tried these today and they were yum!! Except i didn’t see the bit about draining the mix well, and ended up with it swimming in the juices!

  37. Have you tried doing this recipe and/or the one for whole-chicken with the crockpot on LOW instead of HIGH? How many hours?

  38. 4 stars
    Loved the idea of this recipe and what a great rub
    My husband too does not like peppers and I wanted to cook it overnight.
    So I combined the suggestions of eliminating the peppers and cook on low for 7-8 hour.
    I am so dissapointed as my meat must have been so lean and without the moisture of the peppers, it burnt to a crisp (on the outside…I was able to save enought meat inside for 1 meal). AND my slow cooker cracked!

    With such a meat, it looks like you need the moisture from the veggies (even if you use the cooked peppers for something else) and maybe even a little moisture at th3 bottom of the pot (maybe a stock).

    I will be getting a new crock pot this week (a must in a busy house) and look forward to trying this recipe again :)

  39. 5 stars
    This is a great recipe and super easy to make. Awesome flavor and great for leftovers. Loved by everyone in my house, even the itty bitty’s!

  40. 5 stars
    Can this be done in a pressure cooker? I love my pressure cooker as it speed cooks things and I don’t have to worry about leaving the crock pot on while I’m at work (crazy paranoid Momma). Thanks!

  41. 5 stars
    I made these the other night, and they were delicious! My husband, my 3 year old picky eater, and I loved them! I decided to make them late in the afternoon, so I couldn’t use my slow cooker. Instead, I sauteed the beef (whole) on the stove, and removed. Then I sauteed the peppers and onions…I also added a sliced zucchini because I only had one pepper…it was delicious! I omitted the jalapeno because I didn’t have one. After the meat had rested, I sliced it up and added it back to the veggies in the pan, just to mix it all together. The flavor was wonderful!

  42. I’d like to make this tomorrow. Do you cut the steak before putting it into the slow cooker? Thanks for letting me know!

  43. I made these today- and they were amazing! My fiance is typically the cook in our family, but we decided to start making changes to how we eat (mostly, I decided.) This meant it was time for me to step up to the stove and get to it! In this case, it was stepping up to the crock pot, but it was so easy and so delicious! Even my picky little 3 year old liked them. Thanks for the successful recipe!

  44. Made these for dinner last night and they are so delicious. I left out the jalapeño and it still has so much flavor. What a great way to use flank steak!

  45. Hi Lisa,

    I am having trouble finding 100% grass fed beef in my area. The farmers market closest to me states that their beef:

    ” consists primarily of two family farms raising rotationally grazed, grass fed, grass finished beef with no antibiotics, no growth hormones and no grain.

    Cattle are moved to new paddocks daily except for short periods in the winter when grass is scarce. During this time our production method varies from the Eatwild standards in that we confine them in paddocks and supplement their winter diet with small amounts of soy hull pellets.”

    Is this ok?


    1. Assistant to 100 Days (Jill)

      Hi Tiffany. I believe that is common practice for winter months (although I’m not 100% certain). I alway tell people to go with the best that’s available to them. Jill

  46. I made this tonight and it was amazing! My steak was very large so I cut it in half, doubled the spices so I could rub both pieces. I ended up using all the spice but a quarter of it. I also used chipotle powder and ancho chili powder in place of the regular chili powder. I’m putting this in my recipe book!

  47. These were so good! I have 4 kiddos and 2 of the kids even loved these (the other two still ate them, but didn’t rave) and my husband and I thought they were absolutely delish. We will be making them often!

    I wonder if you can substitute other meats…chicken fajitas perhaps?

  48. I made these last week for some company and it was DELICIOUS!! My grocery store didn’t have flank steak or skirt steak so I got London broil (?) and it was still great! And my meat was 2.5 lbs and I’m glad I made it all because four of us gobbled it up! And we wrapped them in iceberg lettuce leaves to reduce carbs. I’m tempted to make these every night!

  49. I’ve looked at this recipe many times on this site and always thought it was kind of weird. In my head, fajita meat is always grilled (or sauteed in a skillet as a last resort). But, we’ve gotten a little bored with our “usual” recipes — and I have gotten off track with “easy” foods, take out, etc. So, this week I decided to re-dedicate our family and put these on our menu.


    They are so good! I am eating leftovers for lunch right now! I thought the soy sauce was a weird addition, but it really does the trick!

    This recipe will definitely go into our rotation from now on!

  50. I made these. They were awesome. I also took them to work for lunch and they didn’t have a microwave, but they are fantastic cold as well. I’m making another batch today to eat this week. I’m trying a flank and skirt steak, the store didn’t have 2 flank steaks. We’ll see how it goes.

    1. Assistant to 100 Days (Jill)

      Hi Helen. You could give it a try. I would just make sure you select a steak that is grass fed. Good luck. Jill

    1. Assistant to 100 Days (Jill)

      Hi Ellie. I don’t see why you couldn’t leave them out, or you could just make it with them and take them out of his serving, that way the rest of you can still enjoy them :-). Jill

      1. Hi Jill, thanks for all you input on the website.We been cutting lots of processed foods now. And I would like to know what could you recommend in substitution of Nuttela(hazelnut spread) my kids love them ! and also my son would only drink chocolate milk although I only put 2-3 drops on Nesquik I would like to know what can you recommend instead. Thanks

  51. Not sure if it was me or my meat…but it was tough. I bought the flank steak, as recommended, and I’ve never had flank steak before so maybe it was just a different texture. Oh and at 4 hours it was pulling apart so I didn’t cook it any longer…maybe that was the problem.
    Oh and the Ezekial Tortiallas (sprouted), not the best taste :(

    1. 100 Days of Real Food

      If the meat was tough (and especially since you took it out a little early) my guess would be it didn’t cook long enough. It just gets more tender the longer you cook it. And while Ezekial brand is a great “real food” alternative I agree I am not a big fan of the taste/texture of some of their products.

  52. I’ve never made a slow cooker recipe without any kind of liquid inside of it. Do you need water or beef broth to make sure it doesn’t burn? Or is the soy sauce enough? This sounds awesome and I just didn’t want to ruin it!!

    1. Wow, my question exactly. Was searching all over the internet for something like this and just thought it was odd that the only liquid was the soy sauce.
      Going to give this a shot this week.

  53. Your recipes are sooooo amazingly delicious! Thank you! I made this tonight and used 2 pounds of round steak instead because there wasn’t a store in town that sells flank steak! It was still delicious! I do not have a tortilla press yet, but am looking into getting one! Thanks for sharing your knowledge and delicious recipes!

  54. Just made this last night and it turned out WONDERFUL!! Whole family loved it and so incredibly easy!!! Thanks for the wonderful recipes.

  55. I made this tonight for the first time. LOVED it!!! Served it over rice (instead of in the tortilla). And, I didn’t drain it; just served with a slotted spoon.

  56. Yum! My husband and I love making fajitas…and I love even more doing it in the crockpot! I will be making this for super bowl sunday. Thanks!

  57. This recipe was soooo good!!! I didn’t use the slower cook, I just used my saute pan. Worked perfect! Made it under an hour. I have four kids and super hubby. All gave it a thumbs up!

  58. The recipe is awesome. So awesome, I want to slow cook all things now. I substituted NM Red Chile, added a poblano and forgot about the soy sauce part, and it turned out delicious.

  59. I found you from Pinterest. I was definitely fascinated by the slow cooker fajitas! I need new slow cooker recipes that my whole family will enjoy and I know these will be a winner! Love your blog and can’t wait to look around more. I am a real food lover myself. Try to eat mostly organic and local and Grass Fed. It’s not always easy to find, but I do think it’s important for our health and our earth.

  60. I made this recipe for dinner last night, and my husband and I both LOVED it! We just bought 1/4 of a grass-fed, organic cow, and this was the first recipe I made with our beef. The only thing I did different was that I didn’t have flank steak, so I used round steak. It was absolutely delicious on homemade tortillas. I know I’ll be making this again! Thanks so much for sharing!

  61. I’m always on the look out for recipes based on real “real food”. Thanks for sharing with the world and I’ll definitely be directing friends, family and customers to your site.

  62. I have to say thank you! I found your blog about 3 weeks ago and cannot be more grateful! By bringing your family to a more healthy lifestyle you have begun to help me as well. I am allergic to artificial additives and preservatives, so your recipes allow me to feel like I eat more like the rest of the world! Thank you!

  63. This looks wonderful and it is a dish my family would love. This is my first visit to yoursite so I took some time to browse through your earlier entries. I’m so glad I did that. I really like the food and recipes you share with your readers and I’ll definitely be back. I hope you have a great day. Blessings…Mary