Slow Cooker Flank Steak
2 Comments Jun 17, 2024
Updated Mar 10, 2025
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This Slow Cooker Flank Steak is a great option for busy weeknights or a meal to cook for a crowd. It uses just a few ingredients with a quick prep time and cooking time.
If you’re looking for something to pair with this steak, try my Slow Cooker Honey Garlic Carrots and Slow Cooker Cheesy Mashed Potatoes.
Table of Contents
Skip the expensive restaurant steak dinner and try my recipe for flavorful flank steak that can feed the whole family for a fraction of the cost. Even better, there are only a few main ingredients like flank steak and sliced onions. The flavors of the steak are made from a pantry staples, most of which you most likely already have on hand.
Slow cooking this flank steak recipe takes as little as 3-4 hours, which means you can put a tasty meal on the table in no time and with no sweat. It’s a versatile main dish so you can serve it a number of ways. It also makes a delicious meal for leftovers.
Key Ingredients
- Flank Steak: The highlight of this recipe is two hearty pounds of flank steak. You can also use skirt steak.
- Onions: Thinly sliced and added to the bottom of the slow cooker.
- Garlic: Whole cloves add flavor during the cooking process.
- Soy Sauce: Cut back on the salt by using low sodium soy sauce.
- Beef Broth: Helps create the delicious juices that flavor the beef and can be used as a topping.
- Other Wet Ingredients: Tomato paste, honey, Worcestershire sauce.
- Dry Seasonings: Ground coriander, smoked paprika, red pepper flakes, salt, black pepper, and fresh parsley (for garnish).
- (Full Recipe is in the recipe card below the photos)
How to make Flank Steak in the Crockpot
Step One – Season the flank steak with salt and black pepper on both sides.
Step Two – In a bowl, whisk together the soy sauce, beef broth, tomato paste, honey, Worcestershire sauce, ground cumin, smoked paprika, and red pepper flakes.
Step Three – Place the sliced onions and garlic cloves in the bottom of the slow cooker.
Step Four – Lay the seasoned flank steak on top of the onions and garlic.
Step Five – Pour the prepared sauce over the steak, ensuring that it is evenly coated.
Step Six – Cover the slow cooker and cook flank steak on LOW for 7-8 hours, or on HIGH for 3-4 hours, until tender flank steak is achieved.
Step Seven – Once cooked, shred steak with two forks directly in the crock pot.
Step Eight – Stir everything together. Serve the crock pot flank steak with suggestion below and enjoy!
My Serving Suggestions
Serve this delicious steak over a bed of buttered mashed potatoes drizzled with some of the juices from the crock pot. Garnish with fresh parsley for a pop of color and added freshness.
This steak can also be used to make enchiladas, steak tacos, or steak salad.
It also tastes great with white rice, cauliflower rice, a baked potato, roasted veggies, or whatever sides you prefer.
Substitution Trick
Add one cup of barbecue sauce to the slow cooker and make wonderful sandwiches from the shredded beef. These sandwiches go great with coleslaw and salt and vinegar chips!
Recipe FAQs
For a deeper flavor, marinate the flank steak in the sauce mixture for 30 minutes to 1 hour before placing it in the slow cooker.
Adjust the red pepper flakes to suit your preferred level of spiciness.
Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat gently to avoid overcooking the steak.
More Slow Cooker Steak Recipes
- Vintage style Crockpot Swiss Steak and saucy Slow Cooker Salisbury Steak are both classic comfort food dishes with tender beef simmered in rich sauces.
- Cheesy Slow Cooker Italian Beef Sandwiches and EASY Crockpot Steak Burritos make hearty, flavorful meals packed with seasoned beef and melty cheese.
- Pepper and onion Slow Cooker Pepper Steak and Garlic Butter Crockpot Steak Bites are easy, savory options perfect for a family dinner or appetizer.
Slow Cooker Flank Steak
Ingredients
- 2 pounds flank steak
- 1 onion, thinly sliced
- 4 cloves garlic
- ½ cup low-sodium soy sauce
- ¼ cup beef broth
- 2 tablespoons tomato paste
- 2 tablespoons honey
- 1 tablespoon Worcestershire sauce
- 1 teaspoon ground coriander
- 1 teaspoon smoked paprika
- ½ teaspoon red pepper flakes, adjust to taste for desired level of spiciness
- Salt and black pepper to taste
- Fresh parsley for garnish
Instructions
- Season the flank steak with salt and black pepper on both sides.
- In a bowl, whisk together the soy sauce, beef broth, tomato paste, honey, Worcestershire sauce, ground cumin, smoked paprika, and red pepper flakes.
- Place the sliced onions and garlic cloves in the bottom of the slow cooker.
- Lay the seasoned flank steak on top of the onions and garlic.
- Pour the prepared sauce over the steak, ensuring that it is evenly coated.
- Cover the slow cooker and cook on low for 7-8 hours, or on high for 3-4 hours, until the steak is tender.
- Once cooked, carefully remove the steak from the slow cooker and transfer it to a cutting board. Let it rest for a few minutes.
- Slice the steak across the grain into thin strips.
- Serve the savory and spicy slow cooker flank steak over a bed of creamy mashed potatoes (if desired) spooning the flavorful sauce from the slow cooker over the steak.
- Garnish with fresh parsley for a pop of color and added freshness. Enjoy!
Sarah’s Notes
- For a deeper flavor, marinate the flank steak in the sauce mixture for 30 minutes to 1 hour before placing it in the slow cooker.
- Adjust the red pepper flakes to suit your preferred level of spiciness.
- Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat gently to avoid overcooking the steak.
Nutrition
Nutrition info is auto-generated. This information is an estimate; if you are on a special diet, please use your own calculations.
This is a great recipe! My boyfriend said I got him from his stomach.
So easy and delicious! I cooked on high for 4 hours and the meat was actually so tender that I was able to just pull it apart with 2 forks and serve it pulled. Will be adding this to my recipe arsenal 🙂