Slow-Cooker Flank Steak Fajitas

Total Time

Prep: 10 min. Cook: 6 hours


8 servings

Updated: Mar. 30, 2023
As a busy teacher, I think it's so nice to come home to a warm meal after a day in the classroom. I'm not the only one who thinks so: These slow-cooker flank steak fajitas go fast at potlucks, too. —Mary Holmgren, Mackinaw, Illinois
Slow-Cooker Flank Steak Fajitas Recipe photo by Taste of Home


  • 1 beef flank steak (2 pounds), halved crosswise
  • 1 medium green pepper, cut into strips
  • 1 medium sweet red pepper, cut into strips
  • 1 medium onion, halved and sliced
  • 1 envelope fajita seasoning mix
  • 1/2 cup beer or reduced-sodium beef broth
  • 8 flour tortillas (8 inches), warmed
  • 1 cup pico de gallo
  • Chopped fresh cilantro


  1. Place the first 5 ingredients in a 5-qt. slow cooker. Pour beer over top. Cook, covered, on low until meat is tender, 6-8 hours.
  2. Remove beef from slow cooker. Strain vegetable mixture; return vegetables to slow cooker. (Discard cooking juices or save for another use.) Shred beef with 2 forks; add to vegetables and heat through. Serve in tortillas with pico de gallo and cilantro.
Slow-Cooker Flank Steak Fajitas Tips

Can you use another cut of beef for slow-cooker fajitas?

When it comes to types of steak, flank steak is most commonly used in fajitas. You could also consider using skirt steak or round steak. Since the meat is shredded, a small boneless chuck roast would also be a good choice.

How can you prevent flank steak from being chewy?

When you make flank steak recipes quickly over high heat, you want to cook the meat only to a medium level of doneness. Anything beyond medium may cause the steak to become chewy. Generally, it's also important to cut flank steak against the grain of the meat for a tender texture. However, this particular flank steak fajitas recipe cooks the flank steak for a long time at a low temperature, which means the fat and muscle will break down and become super tender. Since it's shredded, you don't have to worry about slicing the meat against the grain. It should easily shred into tender pieces.

What can you serve with slow-cooker flank steak fajitas?

Slow-cooker recipes often benefit from fresh and colorful toppings, and this recipe is no exception. Try serving your slow-cooker flank steak fajitas with pico de gallo, sliced avocado and fresh corn. Making homemade tortillas is easier than you might think, and they would be great with this dish as well. Of course, rice and beans are also traditional side dishes for fajita recipes, too.

Peggy Woodward, Taste of Home Senior Food Editor

Nutrition Facts

1 serving: 361 calories, 12g fat (4g saturated fat), 54mg cholesterol, 668mg sodium, 34g carbohydrate (2g sugars, 3g fiber), 27g protein. Diabetic Exchanges: 2 starch, 3 lean meat.