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overhead shot of crock pot flank steak topped with cilantro

Easy Slow Cooker Flank Steak

Samantha Erb
Slow cooker flank steak is a simple, no-fuss way to enjoy a lean cut of beef. My recipe is foolproof and cooks to perfection every time!
5 from 8 votes
Prep Time 5 minutes
Cook Time 6 hours
2 hours
Total Time 8 hours 5 minutes
Course Slow Cooker
Cuisine American
Servings 4 servings
Calories 617 kcal

Equipment

Ingredients

  • 1.5-2 pounds flank steak
  • cup balsamic vinegar
  • ¼ cup olive oil
  • 2 tablespoons honey
  • 1 tablespoon Worcestershire sauce
  • 1 tablespoon Dijon mustard
  • 1 teaspoon garlic minced
  • ½ teaspoon kosher salt
  • ½ teaspoon ground black pepper

Instructions
 

  • Mix the balsamic vinegar, oil, honey, Worcestershire, Dijon mustard, garlic, salt, and pepper in a small bowl
  • Place the flank steak and marinade ingredients in the slow cooker and flip the steak once or twice to coat the steak.
  • Cook undisturbed for 6 hours on low or 3-4 hours on high until very tender. 
  • Carefully transfer the steak to a cutting board, let it rest for 10 minutes, then slice it against the grain and serve.

Notes

  • Look for uniform thickness in the flank steak to ensure the most even cooking.
  • Cook on low for 6 hours to get the most tender steak.
  • Flip the steak in the marinade in the slow cooker once or twice.
  • Do not add water to the slow cooker.
  • Let the steak rest for a few minutes before slicing to help it retain all its juices.
  • Store leftover flank steak in an airtight container in the refrigerator for up to 3-4 days.
  • To reheat, warm the steak slowly in a pan on the stove with a splash of liquid. If microwaving, use 50% power and heat the steak in 30-second bursts until warmed through.

Nutrition

Serving: 1Calories: 617kcalCarbohydrates: 14gProtein: 63gFat: 33gSaturated Fat: 9gPolyunsaturated Fat: 21gCholesterol: 179mgSodium: 433mgSugar: 12g

This nutrition information is based on the exact products I used in this recipe. Brands and sizes of products could alter exact nutrition and should always be calculated independently.

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