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Overhead shot of slow cooker flank steak topped with fresh herbs inside of a black crockpot.

Slow Cooker Flank Steak

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This ultra tender slow cooker flank steak recipe could not be easier to make, and yields the most delicious, tender flank steak for tacos, sandwiches and more!
Course Main Course
Cuisine American
Diet Gluten Free
Keyword crock pot flank steak, crockpot flank steak, slow cooker flank steak
Prep Time 5 minutes
Cook Time 3 hours
Total Time 3 hours 5 minutes
Servings 6
Calories 235
Author Robyn Conley Downs

Equipment

Ingredients

For the Spice Rub

  • 2 tablespoons brown sugar
  • 2 teaspoons chili powder
  • 2 teaspoons smoked paprika
  • 1 teaspoon ground cumin
  • 1 teaspoon granulated garlic powder
  • 1 teaspoon kosher salt

For the Flank Steak

  • 1 teaspoon olive oil
  • 2 pounds flank steak

Instructions

  • In a small bowl, mix together the brown sugar, chili powder, smoked paprika, cumin, garlic powder, and salt until well combined.
    Spice rup mixture including brown sugar, slat, paprika, cumin, chili powder, and garlic powder.
  • Sprinkle half of the spice rub on one side of the flank steak, pressing it in with your fingers so the mixture coats the entire side. Turn the steak over and sprinkle on the remaining half of the spice mixture, pressing it in with your fingers.
    Spiced rubbed flank steak in a slow cooker.
  • Add the olive oil to a 6-quart slow cooker, rubbing it around until the inside is coated.
  • Place the flank steak in the slow cooker and cover.
  • Cook on high for 3-4 hours or low on 4-5 hours, or until very tender. Do not uncover during this time. If it's not tender, you did not cook it long enough. See notes to troubleshoot.
    Cooked flank steak in a crock pot.
  • Uncover and carefully remove the flank steak to a cutting board. Slice against the grain, and serve with strained accumulated juices.
    Sliced cooked flank steak in a slow cooker.

Notes

  • Note: Cooking in the slow cooker will NOT cook steak to medium or medium rare. It will not be pink in the middle. Instead, it will be tender and fall apart/shred easily. If you want rare steak, don't make this recipe.
  • If the steak is tough when you remove it from the slow cooker, it's because you didn't cook it long enough. Add 30 minutes at a time on low until it's tender and cuts very easily.
  • See full blog post above for ingredients & substitutions, and notes on cook time, and troubleshooting.

Nutrition

Serving: 1 of 6 | Calories: 235kcal | Carbohydrates: 5g | Protein: 33g | Fat: 8g | Saturated Fat: 3g | Polyunsaturated Fat: 0.5g | Monounsaturated Fat: 4g | Cholesterol: 91mg | Sodium: 481mg | Potassium: 561mg | Fiber: 1g | Sugar: 4g | Vitamin A: 530IU | Vitamin C: 0.04mg | Calcium: 43mg | Iron: 3mg
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