Make dinner easy with this Slow Cooker Flank Steak recipe! Tender, juicy steak slow-cooked to perfection and packed with flavor. It’s simple to make, delicious, and guaranteed to impress every time.

Top view of sliced flank steak on a cutting board
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Slow Cooker Flank Steak

You’re going to love how tender and flavorful this steak is. It’s a staple in my kitchen and great for meal prep.

What makes this flank steak crock pot recipe stand out is its versatility — you can use it for stir-fry, fajitas, or even steak salads. For extra flavor, serve it with Chimichurri Sauce or Alfredo Dip. My personal favorite? Using leftover slow cooker flank steak on a fresh salad for a quick and tasty meal.

Cooking flank steak in the slow cooker is so easy. It turns out perfectly tender and absolutely delicious every time!

If you’re looking for more mouthwatering Steak Recipes, be sure to try my AIR FRYER STUFFED FLANK STEAK, OUTBACK STEAKHOUSE TOOWOOMBA STEAK, BLACKSTONE GRIDDLE FLANK STEAK, and AIR FRYER RIBEYE STEAK!

Flank steak served with mushrooms and asparagus

Why You’ll Love This Flank Steak Crock Pot Recipe

  • Tender and juicy
  • So easy to make
  • Full of flavor
  • Versatile
  • Great for meal prep

Ingredients Needed for My Beef Flank Slow Cooker Recipe

Here’s everything you need to make this slow cooker flank steak! With fresh garlic, onion, and a mix of herbs and seasonings, these simple ingredients are all you need to get started.

Ingredients for steak in slow cooker
  • Flank steak: Tender beef cut, perfect for slow cooking.
  • Onion: Sliced for sweetness and savory depth in sauce.
  • Garlic: Minced for aromatic, savory flavor in the dish.
  • Beef broth: Rich liquid base for a flavorful sauce.
  • Soy sauce: Adds umami and saltiness to the recipe.
  • Worcestershire sauce: Tangy, savory sauce for added depth.
  • Balsamic vinegar: Provides acidity and sweetness to balance flavors.
  • Brown sugar: Sweetener to complement the savory ingredients.
  • Ground black pepper: Adds mild heat and flavor to the dish.
  • Paprika: Smoky, sweet seasoning for depth of flavor.
  • Dried thyme: Herbaceous flavor that enhances the savory profile.
  • Dried rosemary: Adds earthy, piney flavor to the beef.
  • Cornstarch: Thickening agent for a richer sauce consistency.

How To Cook Flank Steak in the Crock Pot

Now, let’s dive into the step-by-step instructions for cooking flank steak in the slow cooker. This simple process will guide you through each step, ensuring your steak turns out perfectly tender.

Onions and liquid on the bottom of the slow cooker.

Prepare the Flank Steak: Season the flank steak with black pepper, paprika, thyme, and rosemary. Rub the seasonings evenly on both sides of the steak.

Sauté the Aromatics: In a skillet, heat a small amount of oil over medium heat. Add the onion and garlic, sautéing for 2-3 minutes until softened and fragrant.

Slow cooker flank steak ingredients in the crock pot

Add Ingredients to Slow Cooker: Transfer the sautéed onions and garlic to the slow cooker. Add the beef broth, soy sauce, Worcestershire sauce, balsamic vinegar, and brown sugar. Stir to combine.

Cook the Flank Steak: Place the seasoned flank steak into the slow cooker. Cover and cook on low for 6-8 hours or until the steak is tender and easy to shred.

Optional Thickening: If you prefer a thicker sauce, remove the steak and set it aside. Mix the cornstarch with a little water to form a slurry, then stir it into the slow cooker liquid. Cook for another 10-15 minutes until the sauce thickens.

Serve: Slice the flank steak against the grain and serve with the sauce from the slow cooker. It pairs wonderfully with mashed potatoes, rice, or roasted vegetables.

Sliced slow cooker flank steak with onions

How To Serve Flank Steak

  • In Tacos: Shred the flank steak and serve it in soft or hard taco shells with your favorite toppings like salsa, guacamole, and cilantro.
  • Over Rice: Serve sliced or shredded flank steak over a bed of fluffy rice, paired with sautéed vegetables for a complete meal.
  • In Sandwiches or Wraps: Layer the cooked steak in a sandwich or wrap with fresh greens, cheese, and condiments for a delicious lunch.
  • With Mashed Potatoes: Serve with creamy mashed potatoes and a drizzle of the cooking juices.
  • In Salad: Top a mixed greens salad with thin slices of flank steak, adding toppings like avocado, cherry tomatoes, and a tangy vinaigrette.
  • With Grilled Vegetables: Pair flank steak with grilled vegetables like zucchini, peppers, and onions for a healthy, flavorful meal.
Close up view of sliced flank steak with onions and sauce

Flank Steak Slow Cooker Recipe Pro Tips

  • Sear the Steak First: For the best beef flank slow cooker results, sear the steak first. This helps lock in flavor and gives it a nice crust.
  • Use Enough Liquid: Make sure there’s enough broth or liquid to cover the steak halfway, so it stays moist and tender.
  • Let it Rest Before Shredding: Let the meat rest for a few minutes after cooking to make it easier to shred. This also prevents the juices from leaking out.
  • Add Veggies for Extra Flavor: Add vegetables like carrots, bell peppers, or potatoes to the crockpot for a complete meal.
  • Adjust Seasonings: Taste the cooking liquid halfway through and adjust salt, pepper, or balsamic vinegar to match your taste.
  • Use Leftovers for Other Meals: Shredded slow cooker flank steak is perfect for tacos, sandwiches, or salads!
Steak sliced on a cutting board with lime wedges

Beef Flank Slow Cooker Recipe FAQs

How can I prevent my crock pot flank steak from becoming chewy? 

For the best flank slow cooker results, cook on low for 6-8 hours. Searing the steak before slow cooking helps lock in moisture, and using enough liquid (like beef broth) keeps the meat tender.

Can I use a different cut of beef for this slow cooker recipe?

Yes, you can substitute other cuts of beef, like skirt steak or chuck roast. Just keep in mind that cooking times and textures may vary. Chuck roast, for example, has more fat and will become even more tender but can become stringy if overshredded.

Can I use frozen flank steak in this recipe?

Yes, you can use frozen flank steak, but it’s best to thaw it in the fridge before cooking for even results. If you’re using it from frozen, be sure to add extra time to the cooking process (around 1-2 hours), as it will take longer to cook through.

How can I store slow cooker flank steak? 

Store leftover steak in an airtight container in the fridge for 3-4 days, adding cooking liquid to keep it moist. To freeze, shred the steak and store it with liquid in a freezer-safe bag or container for 2-3 months.

Reheat in a covered pan on low with broth or water, or microwave in short intervals, adding moisture as needed.

Equipment Used

More Slow Cooker Recipes

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Slow Cooker Flank Steak

Slow Cooker Flank Steak

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Author: Laurie Fleming
Prep Time: 10 minutes
Cook Time: 8 hours
Total Time: 8 hours 10 minutes
Servings: 8 Servings
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Description

Make dinner easy with this Slow Cooker Flank Steak recipe! Tender, juicy steak slow-cooked to perfection and packed with flavor. It’s simple to make, delicious, and guaranteed to impress every time.

Ingredients 

  • 1 flank steak, about 2-3 pounds
  • 1 medium onion, sliced
  • 3 cloves garlic, minced
  • 1 cup beef broth
  • 1/4 cup soy sauce
  • 2 tablespoons Worcestershire sauce
  • 2 tablespoons balsamic vinegar
  • 1 tablespoon brown sugar
  • 1 teaspoon ground black pepper
  • 1 teaspoon paprika
  • 1/2 teaspoon dried thyme
  • 1/2 teaspoon dried rosemary
  • 1 tablespoon cornstarch, optional, for thickening

Instructions

  • Season the flank steak with black pepper, paprika, thyme, and rosemary. Rub the seasonings evenly on both sides of the steak.
  • In a skillet, heat a small amount of oil over medium heat. Add the onion and garlic, sautéing for 2-3 minutes until softened and fragrant.
  • Transfer the sautéed onions and garlic to the slow cooker. Add the beef broth, soy sauce, Worcestershire sauce, balsamic vinegar, and brown sugar. Stir to combine.
  • Place the seasoned flank steak into the slow cooker. Cover and cook on low for 6-8 hours or until the steak is tender and easy to shred.
  • If you prefer a thicker sauce, remove the steak and set it aside. Mix the cornstarch with a little water to form a slurry, then stir it into the slow cooker liquid. Cook for another 10-15 minutes until the sauce thickens.
  • Slice the flank steak against the grain and serve with the sauce from the slow cooker. It pairs wonderfully with mashed potatoes, rice, or roasted vegetables.

Equipment

  • Slow Cooker, or Ninja Foodi Possible Pro Slow Cooker
  • Tongs

Nutrition

Serving: 1ServingCalories: 70kcalCarbohydrates: 6gProtein: 7gFat: 2gSaturated Fat: 1gPolyunsaturated Fat: 0.1gMonounsaturated Fat: 1gCholesterol: 17mgSodium: 589mgPotassium: 198mgFiber: 0.4gSugar: 3gVitamin A: 27IUVitamin C: 3mgCalcium: 24mgIron: 1mg

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