Easy Slow Cooker Flank Steak

Make dinner easy with this Easy 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.

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. This is the perfect dump-and-go-slow cooker recipe!

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!

Why You’ll Love This Recipe!

• Set it and forget it: Toss everything in the slow cooker and let it do the work—no babysitting required.
• Incredibly tender beef: The flank steak turns out juicy and fork-tender every single time.
• Big flavor, minimal effort: A handful of pantry staples creates a rich, savory sauce that tastes like you spent all day in the kitchen.
• Perfect for meal prep: Makes amazing leftovers for tacos, sandwiches, or rice bowls.
• Crowd-pleaser: Family-approved, hearty, and comforting—everyone goes back for seconds.

Ingredients And Substitutions

• Flank steak: Lean and flavorful—swap with skirt or sirloin steak.
• Onion: Adds sweetness and depth; use shallots for milder flavor.
• Garlic: Brings a bold kick; garlic powder works in a pinch.
• Beef broth: Creates a rich base—chicken broth also works fine.
• Soy sauce: Adds savory umami; substitute tamari for gluten-free option.
• Worcestershire sauce: Deepens flavor; coconut aminos can replace it.
• Balsamic vinegar: Adds tang and balance; red wine vinegar also fits.
• Brown sugar: Slight sweetness rounds flavors; honey or maple syrup works.
• Black pepper: Adds mild heat; cracked peppercorns for stronger bite.
• Paprika: Brings color and warmth; smoked paprika adds a deeper note.
• Dried thyme: Earthy flavor; Italian seasoning or oregano can substitute.
• Dried rosemary: Fragrant and herby; fresh rosemary for a brighter taste.
• Cornstarch: Thickens sauce if desired; arrowroot or flour works too.

How To Make Easy Slow Cooker Flank Steak

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

Step Two: 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.

Step Three: 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.

Step Four: 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.

Serving Suggestions

• 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.

Easy Slow Cooker Flank Steak Recipe Tips

• Sear for extra flavor: Brown the flank steak in a skillet before slow cooking — it locks in juices and adds a deeper, richer flavor.
• Slice against the grain: For tender, melt-in-your-mouth bites, always slice the steak against the grain after cooking.
• Don’t skip the aromatics: Onion and garlic add big flavor — sautéing them first makes a huge difference.
• Adjust the sauce thickness: If you like a thicker sauce, whisk in cornstarch mixed with water during the last 30 minutes.
• Use low and slow: Cooking on low for 6–8 hours ensures the flank steak becomes perfectly tender without drying out.
• Make it a meal: Serve over mashed potatoes, rice, or noodles to soak up every bit of that savory sauce.

Easy Slow Cooker Flank Steak Recipe Faqs

• 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!

Beef Flank Slow Cooker Recipe FAQs

Do I need to sear the flank steak before slow cooking? Searing isn’t required, but it adds extra flavor and helps lock in juices.

How long should I cook flank steak in the slow cooker? Cook on low for 6–8 hours or on high for 3–4 hours until tender.

Can I use a different cut of beef? Yes! Skirt steak, sirloin, or even chuck steak works well in this recipe.

How do I thicken the sauce? Mix cornstarch with a little water and stir it into the slow cooker during the last 30 minutes.

How should I store leftovers? Keep in an airtight container in the refrigerator for up to 3 days, or freeze for longer storage.

Can I make this gluten-free? Substitute tamari for soy sauce and check Worcestershire sauce for gluten-free options.

What should I serve with slow cooker flank steak? Serve over mashed potatoes, rice, noodles, or roasted vegetables to soak up the savory sauce.

Equipment Used

• Ninja MC1101 Foodi Everyday Possible Cooker Pro

More Slow Cooker Recipes

• NINJA FOODI POSSIBLE COOKER PRO ROAST BEEF
• NINJA FOODI POSSIBLE COOKER PRO TORTELLINI
• NINJA FOODI POSSIBLE COOKER PRO GARLIC CHICKEN
• SLOW COOKER MEATBALL SLIDERS

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